Malicious PDF — malware analysis report

Static analysis result for SHA-256 30873926149d6f9f…

MALICIOUS

PDF

78.6 KB Created: 2021-07-06 20:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f7776c701675016fdc0c5428bc2ab59 SHA-1: d4a811740d743f117453c83e8492126799dc3c2e SHA-256: 30873926149d6f9f0e823f9d8013121c660294bc2913e8bcea0419db62493205
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure itself is designed to facilitate malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=lewis+structure+of+cao
    • http://gleneaglehoa.org/images/file/31745335638.pdf
    • http://madiagranitosilano.it/userfiles/files/tinavenovofirumexojomolu.pdf
    • https://suma.ca/upload/editor/file/beputiditizuwefomadubino.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/cd3a4780a2a1a4aa707c28d639c479a0/54511187191.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/9defefd3efa8e8d12c062c2b18272a90/fagusaxikax.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/05c12337c1be7aff179b85c1858fb1c3/73829480778.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160920e24330f4---bogewe.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074fbae2a2f0---bekexubuvaretulegid.pdf
    • https://summit-christian-academy.com/scauserfiles/files/42849971207.pdf
    • http://geriatriccarenewjersey.com/userfiles/files/29495800229.pdf
    • http://beateromer.com/bilder/file/sesaxit.pdf
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/5f3cdc485a684b2c63a4dd600a18e299/76668745300.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ace330478f---bujiferebeketoduvuniti.pdf
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/jodozed.pdf
    • http://ippinnudon.com/uploads/files/83270155380.pdf
    • https://simon-daulte.com/ckfinder/userfiles/files/61104386702.pdf
    • https://airbays.com/userfiles/file/pamatufevazugojipap.pdf
    • https://volnynaklad.cz/data/file/32713390164.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/ce6abb97c1a1df3e00cd48079d391284/51105330096.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/32961ba2fe5893005215e2682cb28593/73518270588.pdf
    • http://donateagift.eu/userfiles/file/71141326918.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea4202eec1---bedetigo.pdf
    • http://appletechsolutions.com/userfiles/file/31727197177.pdf
    • http://muszempilla.com/files/file/fitemizosuxizekij.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_off0000d12e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD12E 16792 bytes
font_01_sfnt_off0000e945.bin
e74cd96decdd4432c8f69609094c617d1dc30bef72454eb2ae066496a62c2699
pdf-font-stream PDF embedded font (sfnt) at offset 0xE945 10324 bytes
font_02_sfnt_off000100d3.bin
7b99eff51de887bb9764572d6c1c3fd24c9dd2830154025d8fa2b9b69309d2b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x100D3 16976 bytes