Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c33b2cbd49091f…

MALICIOUS

PDF

80.5 KB Created: 2021-09-04 20:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 00890609ea1a915e6754f4f2c54b2567 SHA-1: 5a1852618ac7ad2259d3aef1df3bdfc7d0480cee SHA-256: 69c33b2cbd49091f1ec7886324aeaf6b8c7be876435768832e9220bfa4cf2a17
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised websites and a link farm, indicating a phishing or malware distribution attempt. The 'SE_LOLBIN_RUN_COMMAND' heuristic suggests the document may attempt to execute commands, likely via embedded scripts or exploits. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=layers+of+the+earth+project+pdf PDF link annotation
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/57923086385.pdfIn PDF document text
    • http://qdcmd.com/data/files/95805400968.pdfIn PDF document text
    • https://codecs.ro/images/file/96430050767.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/80204449563.pdfIn macro / runtime command snippet
    • http://svazekobciorlice.cz/userfiles/file/loluxovibamofomovikobigu.pdfIn macro / runtime command snippet
    • http://delta-serwis.pl/pliki/24463767118.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/kenaxowanolunosu.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf57db100---84133319835.pdfIn PDF document text
    • https://gencatakan.com/upload/file/69552406540.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/73540203099.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/tagegevejujemoj.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/lokowanudunitiw.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/51047913712.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/mirijiselirokomevefi.pdfIn PDF document text
    • http://unseretochter.ch/images/file/95167804160.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///fobugeresizufumizukiso.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/misobobugarezawe.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160f8d8bf1f9fd---27435067909.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/3abb3f908f89e1471faef1ef96012e0a/83199366900.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/zajux.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/rilesuzes.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/1629471386007.pdfIn PDF document text
    • https://codecs.ro/images/In macro / runtime command snippet
    • https://www.posluh.hr/ckfinder/userfiles/files/roposox.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF53 10676 bytes
SHA-256: 999b2a9500f764f5e2943ce96ffc91959b273e79e94d645e2c568e88b21b6462
font_02_sfnt_off00010800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10800 17452 bytes
SHA-256: 37ddf65cdcdb81b19fadee75c272237d2c5db2368428ca48b6c05af918e70b3a

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