Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34fbbeeeffcb170…

MALICIOUS

PDF

73.5 KB Created: 2020-12-30 06:08:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 81ecf845f2972cb56449d93bbae8048e SHA-1: 7c05ce32d87ce748d496241d5e83952e2187db06 SHA-256: e34fbbeeeffcb170ed176b97a20a685d1fd0d14f60a4cda36623153a38d8fd98
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document functions as a link farm, containing numerous external links. One critical heuristic indicates a link to known malicious redirector infrastructure, and another identifies it as a link farm on disposable hosting. The presence of these links suggests an attempt to lure users to malicious sites, likely for phishing or scam purposes. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://gettraff.ru/strik?utm_term=aristocrat+slot+games+for+pc+download In PDF document text
    • https://guvemixekowarov.weebly.com/uploads/1/3/4/6/134686109/vuwekevij.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/nisomiwepizizu.pdfIn PDF document text
    • https://cdn.sqhk.co/jasowipe/dYgd8hg/the_king_of_fighters_98_the_slugfest_rom.pdfIn PDF document text
    • https://fapizorimuko.weebly.com/uploads/1/3/1/1/131164308/7882651.pdfIn PDF document text
    • https://xaxaguxoludu.weebly.com/uploads/1/3/4/5/134519627/fozodomi-mimuke-masaf.pdfIn PDF document text
    • https://badikixokatapi.weebly.com/uploads/1/3/0/7/130739740/juvegi.pdfIn PDF document text
    • https://kibinino.weebly.com/uploads/1/3/4/6/134603545/tiwigum-wasujutux.pdfIn PDF document text
    • https://gebopudexor.weebly.com/uploads/1/3/4/4/134482947/dumevanewarod.pdfIn PDF document text
    • https://pivisagut.weebly.com/uploads/1/3/2/8/132815367/f4c675a056c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6feef107-71c3-4ca8-94e9-471b42e9cde8/the_third_day_hbo_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7093458-1a10-4703-86b4-27ee1f3ee7bb/sepoguzegomosotelarigig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71f64ab-a91a-4439-a948-43498e0f23d8/35178557710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ae371e-7a87-4598-92f5-acbed89265da/con_law_outline_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a98aa57-bc6d-4a0e-b919-caa905d75b2f/gilavuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232c5a35-a792-4994-a565-fde9dbf167d7/75990823611.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_off0000e162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE162 5556 bytes
SHA-256: c498e565e18630c2252f4c1a67c633f7607cd06c538fb5974ed888b052780b8c
font_01_sfnt_off0000f444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF444 10732 bytes
SHA-256: e067de7d8b2b5aa7d83972569d83ff65be960f7fb6ea64b2acc21e4b7a6693ae

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