Malicious PDF — malware analysis report

Static analysis result for SHA-256 9756d65587f7e432…

MALICIOUS

PDF

73.0 KB Created: 2021-06-28 14:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 79acea0fc7b6e7ed67b07bdd1d2a941a SHA-1: 04d3b93a7377227f7a90b05a88202facb46460c5 SHA-256: 9756d65587f7e4329158e924f4c85e46288b1c81405203982000b8d458124c04
156 Risk Score

Malware Insights

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

This PDF document contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of multiple PDF link farm heuristics indicates a deliberate effort to obscure the true destination and potentially evade detection. The ML classifier and ClamAV detection strongly support a malicious classification, likely related to phishing or malware delivery.

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://oniceh.ru/uplcv?utm_term=word+to+pdf+download+microsoft
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ci99o75tagvdo30kvt46033al2/nugafexegebugeripajo.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qjdjvg79o39bmqg2aro6b9fp40/falaluvoxom.pdf
    • https://agencement-menuiserie-var.fr/stockages/files/sawebova.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8b3acf328---sagetiwusujujup.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070c8bebe1c1---79452538905.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085610bc1fc4---98624565778.pdf
    • https://srmhomes.com/images/bulk_images/files/norinipileranitesokof.pdf
    • http://jarosi.hu/files/file/54112783179.pdf
    • https://metricgroup.it/uploads/file/xutenosutigulufugizodevi.pdf
    • http://premium-h.info/files/files/wagadojowed.pdf
    • http://temple.mo/userfiles/file/10152711122.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a528634ae4a---zatifabekipizigokoxawis.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/8b0830c2b656d832a0a28706bcb770f6/gedara.pdf
    • http://blessingsngo.in/userfiles/files/46666011095.pdf
    • https://naucharts.com/ckfinder/userfiles/files/nudavesidami.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/a570ee9e93e8fc26ec29d297d017e02f/3216490997.pdf
    • http://makinsushi.com/uploads/files/junigebanigasirepikogu.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e32bb4af---wuzozu.pdf
    • https://drsaman.com/files/setawatoleke.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/678c806dab1b2cb1b983855aafc74874/19267721895.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079cfdc9efdd---fuzoletepakava.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a0937813247---841369114.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d56948955f---12032043710.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/f5aff8996dc8850b92323c967b694238/kosujedipuzikafe.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608794eb717cf---44325595805.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba96.bin
a4d08d8a3177d439b79d9832d01ec4db4c023d1b880dc250f42dd21084292db4
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA96 10728 bytes
font_01_sfnt_off0000d343.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD343 16792 bytes
font_02_sfnt_off0000eb55.bin
d955704de4222726b6468c2224d1741d69fd9a26612421da0aa8777a28fa2bf0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB55 16704 bytes