Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee91adc23346efc…

MALICIOUS

PDF

92.1 KB Created: 2021-07-01 00:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9007ff1c48992da967028977fa585004 SHA-1: ac5fa4be806b4f5f55220f34c99309f581504068 SHA-256: 6ee91adc23346efcccee3a1ab7f3707c1885a24b926090a5168c56212e371c2b
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is unreadable, but the heuristics indicate a focus on external URI redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://kbchina.de/upload/mogaworage.pdf In PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5bca53b818---digerexenejexilenasut.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/312416ed770363a5bbd412f96c209a57/68173549079.pdfIn PDF document text
    • http://cba60.com/clients/6/6c/6c2dd71b6188bc8e8f5adc6209c6f86c/File/bitonu.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/8da7222ae4c0b61ba5fe6ea6e7edf09c/17526314297.pdfIn PDF document text
    • https://clubsportedinburgh.org/userfiles/files/54530406388.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/eue44cll5lj03040gejiuj9mj2/fiziwisirema.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/tederagexopo.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/pexemise.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/97a34fa26d084d06155ded052044e9e9/62678152815.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8e0317339---85122828388.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/gupizavekigojixox.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/43c5d93497aed62e4438e43b22b1ad72/73465411825.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/nf1356snnotkkcan6ld8b0ulpn/82650265982.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608037065059f---lelase.pdfIn PDF document text
    • https://t2sc.me/userfiles/wesuxojutak.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/9994baa25491a2aa4a980ca2cb307791/31289110524.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/45518833447.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/81574942181.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/ba04679d67ee9fbaf9ab2fe2446ddef9/50937386640.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/f14daff04caa311cdb26d0827fed02c8/wanefosafipubuzemete.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///89810700827.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=kevin+durant+armsPDF 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_off000103ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FF 18264 bytes
SHA-256: 805cd58913bc91032253ad11dd6cfc75409ec666eccb915727542847ac0be333
font_01_sfnt_off00013425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13425 10400 bytes
SHA-256: 3b947b8767a9cd0cd92c544c0b760467ef34584b43174abda6007cbf168d0d1b
font_02_sfnt_off00014baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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