Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6860d42e1a4916b…

MALICIOUS

PDF

72.3 KB Created: 2021-04-20 09:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: de13cbc14cd1da19db5e24463e49a416 SHA-1: 75c3ca514ef0d8844cee37b750f7bf3d17b84680 SHA-256: d6860d42e1a4916bcd949467400d50c4ad15faf8880a45d7efec34299aed33e2
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with one prominent URL pointing to 'midufefew.ru', suggesting it is part of a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is a link farm hosted on disposable infrastructure, designed to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://midufefew.ru/strik?utm_term=how+to+program+xfinity+voice+remote+to+roku+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475380/normal_6009eda5cabdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495696/normal_5fd2fd288ab5f.pdfIn PDF document text
    • http://slmit.fun/robert_kubica_formula_1_2020f1c0k.pdfIn PDF document text
    • http://tizezs.xyz/ohms_law_practice_worksheet_answer_keypfpst.pdfIn PDF document text
    • https://kukonite.weebly.com/uploads/1/3/4/6/134611202/07e0ffd1408022b.pdfIn PDF document text
    • https://wadaxoleda.weebly.com/uploads/1/3/5/3/135311928/7864665.pdfIn PDF document text
    • http://antileqphh.site/sevuxodi2lqn7.pdfIn PDF document text
    • https://bigubuwona.weebly.com/uploads/1/3/4/3/134309174/af720945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454046/normal_6033288fbd95b.pdfIn PDF document text
    • https://sofirutowik.weebly.com/uploads/1/3/1/3/131381411/a748b82f39e9e9.pdfIn PDF document text
    • https://domolijetokuv.weebly.com/uploads/1/3/0/7/130738933/mimikizeju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_600e03890fbc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378606/normal_6021c5d13bf0c.pdfIn PDF document text
    • http://gukimunejorupod.iblogger.org/54689189136.pdfIn PDF document text
    • http://detonic-official.website/talking_panda_apknareo.pdfIn PDF document text
    • http://suxulopiluv.22web.org/70293169263.pdfIn PDF document text
    • http://gdztut.com/harry_potter_deathly_hallows_two_cast0yurf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446027/normal_5fca293451093.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/lunafegi_bezudixaduli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://segalufosirinep.epizy.com/37072992376.pdfIn PDF document text
    • http://fegugeg.rf.gd/las_nacionalidades_en_frances.pdfIn PDF document text
    • http://jofawapedoguw.rf.gd/6177139980.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_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 5472 bytes
SHA-256: 813762512b7ab3620428ca672b0cd4161fb3439a88680a2442840114e2ca5825
font_01_sfnt_off0000f14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14F 10136 bytes
SHA-256: 30134f3400190780b9900f88a5dae9c6ecbe9c143a146f0de510fe9de758cb23

Open this report in the interactive analyzer, or submit your own file for analysis.