Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d692f2737278a96…

MALICIOUS

PDF

83.1 KB Created: 2021-04-13 04:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d71119b5cf90e86368c8d9678d435fe0 SHA-1: b84a209368c29d70f2f34c9e4d3eaf492c52b108 SHA-256: 4d692f2737278a963fd2bd2a654e7b542a6452552204d10c95a22277fb43399d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, appears to be a lure related to a 'Huskee tiller parts diagram', likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=huskee+tiller+26750tsc+parts+diagram PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451753/normal_6044d8a7c9270.pdfIn PDF document text
    • https://cdn.sqhk.co/javijaxim/Rvibjen/faller_amino_for_gravity_falls_season_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475874/normal_6069d2a484e3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482869/normal_606b0e1ca94cb.pdfIn PDF document text
    • https://xomijati.weebly.com/uploads/1/3/5/3/135329577/4087328.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/IF9Pvjc/jonidufomoloxaxud.pdfIn PDF document text
    • https://pesudimudoselu.weebly.com/uploads/1/3/2/6/132681392/edb50.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/atletismo_de_pista_y_campo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447880/normal_5ff67f3a113d5.pdfIn PDF document text
    • https://cdn.sqhk.co/pumapajewa/icjhShc/african_journal_of_ecology_author_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/iiagjjb/mejudasevoredejitowabenar.pdfIn PDF document text
    • https://cdn.sqhk.co/piredonina/zhiIghO/musitoso.pdfIn PDF document text
    • https://cdn.sqhk.co/zezegawutogu/gjagjgi/nda_exam_2020_model_question_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/kozutani/r8Hidja/mikofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_6063febade308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_6029977551d46.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwoxegolewa/jxEiegh/11570642673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411937/normal_603d1e6de04d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471479/normal_603922923e0dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497071/normal_5fee30c9afcb9.pdfIn PDF document text
    • https://cdn.sqhk.co/neliwuwo/hbKKA1l/56693681906.pdfIn PDF document text
    • https://cdn.sqhk.co/lapitobexeva/jjijjje/lipemagorobokin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wilosokanik.myartsonline.com/pazuxu.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10120 6048 bytes
SHA-256: bb19cfa2f74e0d7f71d48463dda2403c6280bcb2c8fcda60f6d906038cea0c1f
font_01_sfnt_off000115ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AB 11776 bytes
SHA-256: 6407b4f8859fd97970e20ad50c58606d608ea99b2214c8f0a70ae8427afdb8f2

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