Malicious PDF — malware analysis report

Static analysis result for SHA-256 7886016d003d9240…

MALICIOUS

PDF

74.4 KB Created: 2021-08-22 01:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c4289e546e62dfa615484bb30a5811dc SHA-1: 523cfb5d05f55d18797ba2f97b73b94ef94473c3 SHA-256: 7886016d003d9240244b723584efe5b863c7419bb2c60ab849b6c3c4991b7e7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://irlanc.ru/uplcv?utm_term=algebra+structure+and+method+book+1+pdf+chapter+1 PDF link annotation
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/ujoh3bda4s8div88s2s30ht8a1/vemolupariwoni.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f864cdea4b---dinejisawuroxisekifirizi.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c992ac741be---fasuvekavibezoxukewu.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fc62e6cb6---firesulanulanigaj.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/f7c374b6e4bf3abeda6712a7566576f4/51362249576.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/90407967511.pdfIn PDF document text
    • http://allasclub.com/campannas/file/bawawapep.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdf808507b---rigifegunelo.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/56378619292.pdfIn PDF document text
    • https://ecole-anglais.com/upload/files/9717816170.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/o4fvol5c2dda7d77u2b7ns0mta/60643919633.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dda3fe7220e---xujaxesoletadilurevesika.pdfIn PDF document text
    • http://sushibelovo.ru/files/63620781438.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/newovowusapujazovopus.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1624515515.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/85725893256.pdfIn PDF document text
    • http://vhz.cz/user-files/vifuzemosotidirugoxepuwe.pdfIn PDF document text
    • http://linklandhotels.com/upfile/editor/files/64815895925.pdfIn PDF document text
    • http://kor-ra.ru/UserFiles/file/gapidowul.pdfIn PDF document text
    • https://synersys.fr/contenu/file/gasuxexopetisemetivo.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/84052e036dd36ab1a6dc44081667f5f6/87834820367.pdfIn PDF document text
    • https://perfectprojects.ro/userfiles/file/bizepasoliribizi.pdfIn PDF document text
    • http://sparkpro.lv/content/file/62576987837.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/towugizamebuwidopa.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/71546112951.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD762 11340 bytes
SHA-256: d7eb8664cc07332c118232e32b47d5b94c151e88f1b539fcfe4abd5e2aded44f
font_02_sfnt_off0000f18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18C 16240 bytes
SHA-256: 3c103770326b91f54cf7fc427020a121454eb93fc7364b635f88c41c934c3c52

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