Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a7aeaa3b73831b…

MALICIOUS

PDF

71.2 KB Created: 2020-12-28 16:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b4e51496506f111ea3b47dfda9fc01ac SHA-1: ee14e6429c23564ee69d88f585e445ff5e7ee4b8 SHA-256: a1a7aeaa3b73831b6f4003d102bb44da94d029518360b1e29e735ab9afc9ab1b
244 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 as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=connect+the+dots+online In PDF document text
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/2239390.pdfIn PDF document text
    • https://xujuwoxevosu.weebly.com/uploads/1/3/4/8/134896670/99840.pdfIn PDF document text
    • https://cdn.sqhk.co/rabuzopat/biipgh8/amc_theater_showtimes_today.pdfIn PDF document text
    • https://xovozenoz.weebly.com/uploads/1/3/4/3/134348708/222f2d238c0a.pdfIn PDF document text
    • https://fojumotapikapig.weebly.com/uploads/1/3/4/3/134372119/9172172.pdfIn PDF document text
    • https://kubegagalinono.weebly.com/uploads/1/3/4/7/134714436/tetumawa.pdfIn PDF document text
    • https://popibixa.weebly.com/uploads/1/3/4/7/134745137/2136600.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/h2DYjcm/nails_salon_near_me_walmart.pdfIn PDF document text
    • https://jegesasep.weebly.com/uploads/1/3/4/5/134502647/vomabanevuwo.pdfIn PDF document text
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/baxesafazi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/xenozirojoxarikamorutaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ad6861-a3ec-4758-9296-7d1560948115/revenant_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/4225268800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dde9ca55-997a-4d1f-ae04-68b261939043/zewosekuxamorojesolatawif.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/80018119495.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_off0000ce49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE49 4532 bytes
SHA-256: df5cf902789b05472c61c73a980a6ed199821d94b8d18de0b278a5da93520803
font_01_sfnt_off0000dda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA2 10684 bytes
SHA-256: f9794be78b437543541d566de7f4dd44c9222bf54035f8ed2f024bdcb489a4d7
font_02_sfnt_off0001021f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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