Malicious PDF — malware analysis report

Static analysis result for SHA-256 9290969fa595dd1f…

MALICIOUS

PDF

69.4 KB Created: 2021-06-11 13:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58a60d1700b5d13a07491a197c64f428 SHA-1: a5a51d9fe96ce4417b73eb73716dc9e6a9032e9c SHA-256: 9290969fa595dd1fdb88243e1fab25e5f59b02f0a2aab47f20d0ccb0cb05b7c0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable hosting. The primary lure appears to be a fake download link for music, which is a common tactic for distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://laborke.ru/uplcv?utm_term=download+lagu+xxxtentacion+full+album
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0314a6f6f---42930373689.pdf
    • https://chaplains-camps.org/upload_picture/file/badiwabalenekemerijuj.pdf
    • http://interno-kazan.ru/upload/files/pabazojeriwidezetufiwo.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb720d8cf63---34203360471.pdf
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/61783369175.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607694e8100ea---28807958458.pdf
    • http://chiengthai.com/file_media/file_image/file/vorevopefife.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/93fdaaceefa4eb4dfb630da971932f52/26808170637.pdf
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/2pf9m3oaj7pttlsc4k6pdh92fu/66918331319.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795ff6d222e---nipida.pdf
    • https://fwullong.com/upfiles/editor/files/dugixes.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ntnd30lnmuufj8rblh43ngjsmn/vipetanigijepazarirudofu.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/forezejufekunarovimiwune.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1cbe05fbe---56439697574.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8304322e8c---jetipodideduradu.pdf
    • http://playbabydoll.com/userfiles/file/90348747045.pdf
    • http://kinel-hunter.ru/upfiles/file/koponujotobesilofi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfd1.bin
143c77293c30cb29fed5707ed012199241e20c70ad79fb33e7da6bfc36aa0db0
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD1 5368 bytes
font_01_sfnt_off0000e229.bin
9018fba8454d782ffead160fccd24f960e464e54dd508afa8f52263810970452
pdf-font-stream PDF embedded font (sfnt) at offset 0xE229 11344 bytes