Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2ac0ca02eb2346…

MALICIOUS

PDF

88.2 KB Created: 2021-08-03 20:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5b5caf48db5b9f739641e2e27d1db31c SHA-1: 1a9c1cf5f996c97548480c84407ad51f28ce7d3c SHA-256: 7c2ac0ca02eb2346f1353f802a7cac1598546c9787df658e5c746961f01efb7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://catamma.ru/uplcv?utm_term=ninjago+season+15+release+date+us PDF link annotation
    • http://ideas4mypool.com/userfiles/file/mibutuxidoverabalan.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/sekaga.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a797c121a79---5514790082.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/59188495780.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/47924325038.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/e7cb7fa2a6614aa5ad891454a146ba24/vunivakuril.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/4774410949.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b5e986bf8---14538173247.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce98f1bb03a---30296186182.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/40149319659.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d372d04ca78---49578551461.pdfIn PDF document text
    • https://nevisnews.com/userfiles/29220598347.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210801104125.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/40617234cba80a07fa1ed015e9e5c136/96906743401.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608091e6aa727---dotidebun.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/90711407053.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecd1c43e34---govibogowog.pdfIn PDF document text
    • http://greenbrier101.com/userimages/ronurovanibegufezaba.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/84285035470.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16087999b93234---kokugemovumidegut.pdfIn PDF document text
    • https://werbemittelag.ch/upload/file/47745277406.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4b0a648ba---fatopake.pdfIn PDF document text
    • https://andrejc.si/files/file/3827111068.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_off0000f1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FA 10816 bytes
SHA-256: c724ec93e6adfcf5f6f5e3ed14d9b057e89e1230134c7a5b08e2c7ce3a3f93af
font_01_sfnt_off00010ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE1 18044 bytes
SHA-256: fe46071182ae2b4c59fff6e54b7eb908382fa6eec2bded025c19638ffd892d3a
font_02_sfnt_off000139dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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