Malicious PDF — malware analysis report

Static analysis result for SHA-256 46cbd884c970b565…

MALICIOUS

PDF

82.6 KB Created: 2021-08-24 23:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: be2d217449de2ba16e2481c8f549ada0 SHA-1: aa5b04650e9d0adc241c2cc935104f859cee2c8f SHA-256: 46cbd884c970b5655c413bc8df7e317688192903ca8cf195360d22eff236c8bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the heuristic firings strongly indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://coiffurenais.com/userfiles/file/16282477824.pdf In PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/0853a7047069ad399545d3e6a5153134/nepod.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/3b0614fc6ebf73d8fcc5cb08c69cafca/92029160730.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/cd55da4dbe1e875d3fb03eb6771743c1/pizepiretabajusukegefadel.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/ts2ghaqvth6ne2ufg060k9qfbpdl78he/figelunanogosuxexujes.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/42218584832.pdfIn PDF document text
    • https://flyingfish-stay.com/userfiles/file/31389580770.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/kifimijewa.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/2645ffa541ce491daf4acad191687e1f/punerazetidinemito.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/kejupeben.pdfIn PDF document text
    • http://gesgo.de/userfiles/file/pivujoxetojokokexuxefinal.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/n7si40kj74h3ncqbd5dgtndd94/41561563860.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/f4a9c0e4e58b9e012b99fb91471e5ca2/nubivipafivinopinirimibof.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/waxeropujapawe.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/4f69d21a5da4574a4612a90221678de5/materudagiw.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/gudujirusurexeri.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/sexopinipuk.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/33449767530.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/qbd5595ajc1bo0brme7ohsoemu/23213892667.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/2991097036.pdfIn PDF document text
    • http://abnicum.com/files/file/81158795706.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/11979881234.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a7b676c52---86633464082.pdfIn PDF document text
    • http://schubert-hh.de/image/file/nuzekokexunow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=all+types+of+fairiesPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF701 10344 bytes
SHA-256: 3aa8fba48b1c36530bfb2d9bd0f818a29bb3a1f276e1616b2479117cc72a45c3
font_02_sfnt_off00010e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8C 17848 bytes
SHA-256: c12fe3e1fb5b0e7aa882b2c2af4d28f4d4350631c4f544219b6c0eabcd067180

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