Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f9b07b54ef4114…

MALICIOUS

PDF

88.3 KB Created: 2021-05-21 21:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d3c2b5d7c84f76e079412d556b413eca SHA-1: e535f7f3c3ba2425aa23d397be52a5d3acffe86e SHA-256: c6f9b07b54ef4114e908174a36c1d04ec6769396479146f10900370b9080cac5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains an external URI pointing to 'resalured.ru', which is likely a malicious domain used for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host multiple links on disposable domains, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=how+to+get+mystery+gift+pokemon+emerald PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499622/normal_600dbdc0194f9.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/vurexunonewa-fenutatodazi-foziratudin.pdfIn PDF document text
    • https://nolobatunu.weebly.com/uploads/1/3/0/7/130740420/nedamorugibuli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380088/normal_5ff35be80109d.pdfIn PDF document text
    • https://sowidokobixu.weebly.com/uploads/1/3/1/8/131856306/wimuvidamavatulil.pdfIn PDF document text
    • https://monoxoni.weebly.com/uploads/1/3/0/7/130738852/5c94cee53548237.pdfIn PDF document text
    • https://dilukali.weebly.com/uploads/1/3/4/5/134584555/wuwulifuve.pdfIn PDF document text
    • https://kinajerabisar.weebly.com/uploads/1/3/4/7/134748515/c0e82da.pdfIn PDF document text
    • https://zogabimokesowu.weebly.com/uploads/1/3/6/0/136082780/ridabizanifop-buguluxa.pdfIn PDF document text
    • https://kasitawudak.weebly.com/uploads/1/3/1/3/131380619/caf2731494a7e1.pdfIn PDF document text
    • https://ramimuluvisefo.weebly.com/uploads/1/3/0/7/130775145/vugilesub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/area_and_volume_of_rectangular_prism_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/64581572617.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/rozufub.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/fojabigedaburo.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/computer_science_engineering_books_for_competitive_exams.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

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_off0000ef91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF91 12764 bytes
SHA-256: d91bf5a4242dd6cb3e2336f3a9cdb532ccd4f07f3209e720575f1b2acb1eb660
font_01_sfnt_off000119b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B6 5580 bytes
SHA-256: 591028bf490ca6828c127020f18b241741c57370c01e042687a0ac0b6d2b3944
font_02_sfnt_off00012cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC0 11072 bytes
SHA-256: ec3891d9ff14d745db235d0a8a4d823160fd437026f0ff4a99adcc6b442fd34b

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