Malicious PDF — malware analysis report

Static analysis result for SHA-256 07eaf9d1537aedc2…

MALICIOUS

PDF

70.5 KB Created: 2021-02-14 01:20:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 386cd2de6af2993dbebebe6fe2573a6e SHA-1: b7844ad65bb6be35de9f9c7914185ac9282a026a SHA-256: 07eaf9d1537aedc2679f3d228b913020b1440022ab70c20dd9e7dd9bcb15ee02
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 multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The presence of external URIs and the 'link farm' heuristic strongly indicate the document's purpose is to redirect users to potentially harmful websites.

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://seumenha.ru/wix?keyword=fender+amplifiers+guide PDF link annotation
    • http://italystore.pro/zapujosazuvulerikoxiwiv8236g.pdfIn PDF document text
    • https://cdn.sqhk.co/merojuniv/da4J8jg/whatsapp_image_full_size.pdfIn PDF document text
    • http://drovazvenigorod.ru/non_chronological_report_writing_checklist_ks2d5sxd.pdfIn PDF document text
    • http://mini-cam2.club/vampire_diaries_season_1_episode_1_wsht44.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/42fcb64d.pdfIn PDF document text
    • http://introdom.ru/kettering_ohio_police_accident_reportssx4d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470832/normal_600653a986ca5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417030/normal_6007c550c07ac.pdfIn PDF document text
    • http://lodixewovufosa.iblogger.org/lagu_billfold_bisa_akustik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kodexogezetegir.epizy.com/ludoxulutikijaginos.pdfIn PDF document text
    • http://fatapiwav.rf.gd/fallout_4_creation_kit_xbox_one.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/pemijesezakoti.pdfIn PDF document text
    • http://limopapelekoke.rf.gd/21462605108.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_off0000d95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95B 5316 bytes
SHA-256: 9ee535e03d5ed453c970f70dfaaf0b06fb01458194eafc916d69309c2d799b38
font_01_sfnt_off0000eb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5B 10000 bytes
SHA-256: fff8266e54a2a5c6a7eebbade4df0913314a583063023216fc0eed3c118902ae

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