Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0dfebaea6edf40…

MALICIOUS

PDF

86.9 KB Created: 2021-08-30 15:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e3ebf98e9f3f6d8b4fc30f1be4e3dca7 SHA-1: ab2005ad5d8ce01df9315b2f8cf94b7efe87e4a2 SHA-256: 6d0dfebaea6edf40ae77a9b660624bccd4227085fdcb3ae5ae34016d76453cd0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs that form a link farm, directing users to compromised CMS uploads and disposable hosting, indicative of a phishing or malware distribution scheme. The PDF structure and embedded links suggest an attempt to trick users into visiting malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=the+government+general PDF link annotation
    • https://agrolliance.ca/ckfinder/userfiles/files/6730693600.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612889e9d8e4b---7780231954.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/es6ac5b92gfa2g6357e3i0332o/vebevenomituwabi.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/ruwuwuxulibegebometew.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021070122085336.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/42502953814.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/85240126686.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/tewujepupebixedobokoti.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/15401366004.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/22665859991.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/88113874761.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca69de1a37---daligodikugaxipalaz.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/kuwumopitovokabijafof.pdfIn PDF document text
    • https://illinoisfiscalpolicycouncil.org/app/webroot/userfiles/file/jonej.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/53622457024.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/693dc9fb90288acc51f3a57bd251a564/93083025717.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/kesefewovunobewokikoxuta.pdfIn PDF document text
    • http://cutencuddlybreedables.com/_images/file/99899633149.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f3026543c64---3161716223.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/3hpec7vuieg4a52qcur0eh6o72/2920871756.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/ribolosune.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/45540426525.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/3512724889.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a696cc373---bifupawarebonakatexevunaw.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792d0664f3a---zasitapodudalavezenumup.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_off0000f099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF099 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B0 10324 bytes
SHA-256: 41f635117a1f747c95309cfb0ccdbad0c756f5b30b5dd8bdaf399f515cba32f5
font_02_sfnt_off00011fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCC 17844 bytes
SHA-256: 3dcded3196cd54a7ddbb322ddea7f2132724f803464840b3cb092656cd2bc106