Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6069f5db6c76df2…

MALICIOUS

PDF

74.0 KB Created: 2021-06-19 04:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 22af3d35e0d397c2d59f2f7c9bd2b0c7 SHA-1: 9fb40dcfabcd027caf7d951cb586a924024b39ec SHA-256: b6069f5db6c76df2c336241a44359a1beff7b41f84aebf035361b61092b2587a
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs that form a link farm, likely intended to direct users to malicious websites for phishing or malware downloads. The document body, though heavily obfuscated, contains text related to movie downloads, suggesting a lure to entice users to click the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://archism.ru/uplcv?utm_term=singh+is+king+full+movie+hd+1080p+blu+ray+download PDF link annotation
    • https://beautyreviveshop.com/newerac2c/userfiles/file/8645950253.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/a5ac388a4777eca9f5097672e58b73b3/46557959775.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607461e89319f---vixojupux.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/40025ef601967b0727eaf2061038c01b/pezizebodezimozudaki.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ae1b7540d---zavojunoberufawib.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/2d0272c93a154067952b6998633737e8/71080901326.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/5555a4c5b28c2376b7e55379c7a6b3c6/30821836481.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/xakiwusuzasitavojezifuka.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8fc995654---21352990843.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/budovovod.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/cc97a8674b72bba0b4bb35d801c4a20b/44913788928.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cd4d0fe8c---buvanuxapebelorerap.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082df7ba4d64---92118336548.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/a79948b6d18ac37c7ec49a0a04530a57/41435138531.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000c803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC803 6404 bytes
SHA-256: 1c29c2b4e3c2afa0e4a3d4c8523f0f1c598aaf2a92158e419b17358c41bc1c01
font_01_sfnt_off0000ddbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBF 10908 bytes
SHA-256: 7cc8f6e37b3b1dd5bf96ee81502617a77b6bc3ad86af8387812f29cebe614ba1
font_02_sfnt_off000102e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E4 16192 bytes
SHA-256: f156360c7b75f0fd57a4aeb4ccb63bf624dc01f9da7188d0aa9b3d3ed409520b