Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d70c9fbe9caf2a…

MALICIOUS

PDF

95.5 KB Created: 2021-06-17 11:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 65581cfcb739b87fd87fa8cee420e6bf SHA-1: 6918b053183cf5b5cf6fe389a3a3288656820bad SHA-256: 32d70c9fbe9caf2a0a48c9d93a9e79ed78a651a1b4428b3400170390a9dea4a2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. The presence of these links and the overall structure indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://huntic.ru/uplcv?utm_term=daz+3d+studio PDF link annotation
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3d9077959---24752625793.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/99446150900.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/99617524737.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e84312c18f---vorezabamilure.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/p5nm46pbsniq9mdb29lo51v6a0/kunabuti.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/timubevunifuk.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085f72a31df9---69543040093.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7ffbe03a0---jadir.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/zikotex.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/67860753799.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2171c9773---36281067252.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e483820e1e---nidamijagiwekabojukabojan.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/f3641d0588835a874deab6ba387eff4b/xavobogoperi.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/napodupewodesifasiratiwer.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835863d849d---60748556425.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7395847af---73668475512.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/45162772200.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13984 4904 bytes
SHA-256: 8ac5bf780fe628ed3fe2cb0095fda38d18a066431d25346dcaf1fa588cb47fec
font_01_sfnt_off00014a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A54 11476 bytes
SHA-256: 6298a62c21acb50387dcc6ff1da47eace39d7409a795c1f1dd0c365a8e2701f3