Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7c6285bacf5dc64…

MALICIOUS

PDF

76.0 KB Created: 2021-04-08 16:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1debd8f1adc2ea9830c218fd4d1f7922 SHA-1: b82d3bcebffefe84eb013bf4f4085d0ae3427b40 SHA-256: a7c6285bacf5dc64a478207c5854a307177d5b5ab65653154fb96f6e9d3b4211
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with a primary external URI pointing to 'https://druttle.ru/strik?utm_term=what+is+iatf+16949'. The document body, though heavily obfuscated, suggests a lure related to 'iatf 16949'. The presence of multiple external links and the overall structure indicate a phishing attempt designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/strik?utm_term=what+is+iatf+16949 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417992/normal_5fd259816d8d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381539/normal_601596e2bf69b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499995/normal_60035228937ea.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CKsihKb/40504930244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_60187ba5c7305.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/ijiXOD3/sogurelazifufefipofowanin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455890/normal_5fd0337ed31d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374852/normal_5fc98d4019160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472793/normal_602bf5806f2fb.pdfIn PDF document text
    • http://rudazaxume.iblogger.org/72716862051.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/jcSsm7q/83648966349.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504870/normal_5fedd745a085c.pdfIn PDF document text
    • https://cdn.sqhk.co/jerowerar/hhbyhd0/harvest_hosts_california.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/gijjdW4/frontline_army_commando_war_battle_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369514/normal_600358415c40e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376857/normal_5ffe0d00e34c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_6a81670595314670a1e46e11cff07d92.pdf?index=trueIn PDF document text
    • http://vonupov.epizy.com/exam_date_sheet_du_2019.pdfIn PDF document text
    • https://2a26c5f8-c4f8-4af8-830b-7e2c9961bd8e.filesusr.com/ugd/2e4362_484674ef85654b0fa76113578c2f82e9.pdf?index=trueIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_7f6dba8354c84b85ba89c85b7f0c9d44.pdf?index=trueIn PDF document text
    • http://gubodasitonobu.epizy.com/bravais_lattice.pdfIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_dc16a8f6e31d44aab4d567ddd810ceca.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF5 5192 bytes
SHA-256: 0ce3de4a2882f3580ea1877f256dc0b075867ecaeeb0648226f5e83028058965
font_01_sfnt_off0000fcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB2 10784 bytes
SHA-256: a14b615dfc5054fdb1a0e1e7376fa834a9ced017825a01826ea1243ea21e9a8c

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