Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbb2c6fe86884a6…

MALICIOUS

PDF

86.9 KB Created: 2021-07-03 12:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1bb7e34fd243f6b397c1723b96973567 SHA-1: aeffdc191b940b6eba87ac581753c6b1bd1c1edb SHA-256: fcbb2c6fe86884a6f6aac51dc9afa035e24ab36db06bacbe65eeb66e91bcc3d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress or disposable hosting sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URI and link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://inwebjor.ru/uplcv?utm_term=god%27s+promise+to+abraham+and+sarah PDF link annotation
    • https://olivierdaulte.com/ckfinder/userfiles/files/wojokozitimopogorepu.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b85fadc4153---72832365650.pdfIn PDF document text
    • https://cargotavio.ru/files/file/zumivov.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/20abn8aod6qhl7d10lq4he4hmq/98817172684.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/73062183507.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/62591514897.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/776c308bef12da8d9690b0441b0e506c/67930632113.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/17401687449.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093dda8b48c2---83246491382.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/nesokuwuwalatimavo.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c5b04a0f6---96490938462.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/95323834190.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/c8f16c01a14aea2e44d9d8ece827bcbe/wekavovuwatepixurudidad.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/prgf6l80t0lssivuudbsda57f2/94456089442.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085517f34f6e---82375761376.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/lefexojigasi.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/numugatuxuvuvo.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/0dc5a506e8876469b76b2f6c89fb60c9/vodomipolosuxifideg.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608638b97a09d---93411600137.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd51fa6671---kilovoz.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160888579dbd11---75061776218.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/oea3p5n33q4nl5ts8a8uqoakp0/27048270931.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/sojudanoza.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/72562509823.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_off0000f207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF207 10824 bytes
SHA-256: 50536e0c13a83cf0326f02665552296c5b05130de538e44a22623e74b42d3bbe
font_01_sfnt_off00010aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B5 16816 bytes
SHA-256: 929b1fa8353d06c6548353431adb986714686751d73d20507827006876dd1257

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