Malicious PDF — malware analysis report

Static analysis result for SHA-256 4967037c834daa3b…

MALICIOUS

PDF

98.9 KB Created: 2021-07-01 10:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1f41bdd06ae24d9e19d366d2cc39918f SHA-1: 8b212b4b9609f55ee45c3032d7ee6f70baed36d8 SHA-256: 4967037c834daa3bfb4d9ec70376ab3d2bb095a6683e9de555a1417a78d6877e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of 'cmdqpg6akhss8s2/xovosorefonuwog.pdf' within a URL indicates potential command execution or obfuscation, possibly related to JavaScript exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/4384b71f82b82ca5568aecd0f6c2d3ba/pexoneferaxu.pdf In PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d479d6d2bc---16228400278.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce1f38eb0f3---27679749407.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/budozezizoji.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8bc54c88f---48533881824.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/2uqpg33vuoscmdqpg6akhss8s2/xovosorefonuwog.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/a624950fdb2a1331134e5b5ae80089a8/72793626047.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d12e0876c5---lepufegetenapojamiluvugan.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/bda1ae1f7802bf9b43a57bbb28e8dac7/bozozuzagejezulir.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/28663767890.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/cc37aa571d13552f0dff7cb06b62d4fc/61533124478.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/50395557da6913d2e578aae526824f70/zinanipof.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/5bf2769781d19b5ec73fa12c878e6181/56113194639.pdfIn PDF document text
    • https://amblamy.ee/upload/file/42456734120.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/edgupmn22s4mlsjk0mvk5b2bb7/2178445016.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/50880018370.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/ce16d02bc3da6114ee6e059f1ca589b7/55796433727.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/h6b4iheelv44or1ls5vlkn0vbq/zazagigerupudikikujeduge.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/c16e3lv371v0l6ibrd18gf2ic2/93906011920.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/34409679838.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/cbd61067be8c3894ad5aff12ada6b33d/77180482646.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/remegowupafonazosop.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/20d2f380e762846787650c130b31a6d4/22668626176.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/qc4f03p51pqeb2rk3dofcikou9/dogitojenuwunusesul.pdfIn PDF document text
    • https://antoinepanau.comIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=dnd+5e+ray+of+sicknessPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA4 19548 bytes
SHA-256: c3d90620a6021a101d7bcdc627fc136cc1e324c644a0800ef427abb7c58af3a4
font_01_sfnt_off00010d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D52 10668 bytes
SHA-256: 68215582817f118fe64fd838e1afc2b27545f1f4225e038149b6702f54bd5de6
font_02_sfnt_off000125f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F1 22668 bytes
SHA-256: 964f5967813877567e3d3112c0e732e395c90dbfcc8b773b01f57d9f6a01b9e8
font_03_sfnt_off000165ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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