Malicious PDF — malware analysis report

Static analysis result for SHA-256 5994ea7cdbdc207c…

MALICIOUS

PDF

89.8 KB Created: 2021-06-28 08:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: bf6c47fadd33fc8f3570e0793671008f SHA-1: 458ec0c038cb13b0649d61b43558b55a35e7aef9 SHA-256: 5994ea7cdbdc207cbffd7b2b04f7f0aac23059a0fd915d9a856174a05e588e80
156 Risk Score

Malware Insights

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

The PDF contains numerous links to websites, many of which are hosted on compromised CMS platforms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. The embedded links are the primary indicators of compromise, likely leading to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/dql54gc088cvdapfikl5vleic1/14219483390.pdf In PDF document text
    • http://100gastro.cz/soubory/files/winideropowareseni.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609648321770a---16329619040.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a79da401286---64895929761.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/wamijofag.pdfIn PDF document text
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/vomajalosa.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16087e92778d5c---dumaro.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/sonodawokudasikaf.pdfIn PDF document text
    • https://zzwgjx.com/d/files/dagonujekifurexugoginokuv.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9f3fb3c03---91775523577.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/df9deaf86679faad0d069603a0345d21/pifimuzawul.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/nekujoteralosowetegowa.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/sababagosudofugafabirakir.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c589fab7140---85665703708.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/49527982309.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/liragob.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/d3e4f5af9d1069ae635de9381d0978e9/49967170875.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/fd3250af1885927e2644cd54d60dab51/fuxemegubusugemis.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/d6da599bd885d44a83eb1f9c75759cd4/63720862139.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+draw+celestia+from+my+little+ponyPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF322 10972 bytes
SHA-256: 2438b7bb9605dcf9bb01408b99a476277fc2643b7de448e61d9d502793409ce3
font_02_sfnt_off00010c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C94 18052 bytes
SHA-256: a89625f66fdbee3c298503e4d14dd538ce8e0ab77a6d5f1ad04deaaa2e5949a1
font_03_sfnt_off00013aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAF 16176 bytes
SHA-256: c3e56fd2fa801166b8887c4cb89358c13d1a8fa2faf578d31b647e7707e8ae56
font_04_sfnt_off00015057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15057 1872 bytes
SHA-256: 257360def9f93596814ec8e72e4091915ad9ca2722f3bfaf47919f7cbef0c443

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