Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea7b95c6a024550…

MALICIOUS

PDF

85.8 KB Created: 2021-02-15 19:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 57c2bfd37d0b8aa1933e58ddb431d9c1 SHA-1: 8af66713e1fa4f91b1c74e1594d3a52244e6e217 SHA-256: 6ea7b95c6a024550ba47592a2eb34d1e64b06120c576c5fe874a18cdc394378b
146 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. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. 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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/123?utm_term=jabra+step+wireless+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471941/normal_5fec42d2cdd56.pdfIn PDF document text
    • https://dakubazelup.weebly.com/uploads/1/3/1/4/131454222/finelegarato_fejoju_rupulojesusiwik_suvutetimoziz.pdfIn PDF document text
    • http://kumaboperituf.22web.org/walmart_twin_bed_sheets.pdfIn PDF document text
    • https://felavutiz.weebly.com/uploads/1/3/1/1/131164211/8a2f329530a.pdfIn PDF document text
    • https://fukituxepuronip.weebly.com/uploads/1/3/4/6/134605821/dawefasi-pokepirob.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/Rqgajha/14091035385.pdfIn PDF document text
    • https://pajowivi.weebly.com/uploads/1/3/4/9/134904739/3450820.pdfIn PDF document text
    • http://hotita.space/what_is_visual_representation_in_language_artsxjwnx.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/6G4ijgc/terokorenuwevinora.pdfIn PDF document text
    • https://cdn.sqhk.co/tofatuxurejo/wjehdzj/hidden_valley_ranch_ingredients_list.pdfIn PDF document text
    • https://buwumesuja.weebly.com/uploads/1/3/5/3/135303403/woluxaj_lowadunovani_parigobude.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/womirofop/australian_healthcare_industry_report.pdfIn PDF document text
    • http://lofekelatek.epizy.com/76215128565.pdfIn PDF document text
    • http://panadokopejed.epizy.com/xabexozusejekiwolu.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/32193587683.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/autodesk_recap_360_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/global_geographic_information_system_gis_market.pdfIn PDF document text
    • http://vakebajenom.epizy.com/chelsea_derby_match_report.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_off000112d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D0 5188 bytes
SHA-256: e1e28a8deb58a25fa68e17179d819a2a4e1c086f9565438c70b107f6c55577ee
font_01_sfnt_off0001246d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246D 11040 bytes
SHA-256: 6d090f88d4ba065658a888f7235aaf925161252d0534ef2d30a3645d1591632a

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