Malicious PDF — malware analysis report

Static analysis result for SHA-256 2acd64162e9927b6…

MALICIOUS

PDF

90.9 KB Created: 2021-09-15 19:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ac413960e0902c75f266ea7447d672eb SHA-1: ec15d09fd97af08e297c5dbde02d5c964874bac2 SHA-256: 2acd64162e9927b6a9c125a5a967c1399257df0a77f4d4980170a33f70270b1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to various domains, including those hosted on compromised WordPress sites. The `utm_term` parameter in one URL suggests a potential SEO manipulation or lure tactic. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://synerhu.ru/uplcv?utm_term=8+ball+pool+hack+auto+aim PDF link annotation
    • http://www.vandiestbrandstoffen.be/uploads/files/32893870906.pdfIn PDF document text
    • http://aquitaine.annuaire-regional.com/ckfinder/userfiles/files/laned.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/16c3ac1db312b0b2411a97c35c0bdbd2/nokeva.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef9c9b304c---kuwazuzikexowurezuze.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/woted.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/gawakik.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/37327465768.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/93768318380.pdfIn PDF document text
    • http://yejida.com/userfiles/file/devukitinujug.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/siwapopuwogebaxuzijowefux.pdfIn PDF document text
    • http://lifecontinues.ru/images/files/37544525412.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351166bfe7b---67135892651.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e31a25d17f---2615893372.pdfIn PDF document text
    • http://unionnutritech.com/upload/files/28245885812.pdfIn PDF document text
    • http://rjt1.org/upload/files/94676854733.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/b0enjf086cnu22vfh9m1p1r45h/jizelimo.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/xifobeji.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/1969413098.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/42250518086.pdfIn PDF document text
    • http://vyrukrc.lt/userfiles/file/60541410550.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161334ebc161bc---77834998719.pdfIn PDF document text
    • https://datajournonepal.org/files/37959170729.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/33152143333.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/48461242344.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/33804875039.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB2 16148 bytes
SHA-256: b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59
font_01_sfnt_off0000f241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF241 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A58 10576 bytes
SHA-256: 444f9cf8a62c9edc24e7dc7d62d964225096b6294954a3b9810fd7a8ca8a8734
font_03_sfnt_off00012240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12240 22700 bytes
SHA-256: 94c1680de5b76504ce7e54ee6a7bd69eb201bd9bff6ec86965b4432aea8383c8

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