Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bc75eebb02bdef…

MALICIOUS

PDF

73.9 KB Created: 2020-12-30 02:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c5803a511c2d11a2ad9f569c636083f2 SHA-1: 91f834b3ad18b5e5b9fe851ee1bf2b194809a574 SHA-256: c2bc75eebb02bdef567da1e3fd7979a18aff63335204722e2cbe74b9362a1af1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The primary URL, 'https://traffset.ru/strik?utm_term=soccer+battle+game', suggests a lure related to a game, likely to deceive users into clicking through to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

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 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.
  • 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://traffset.ru/strik?utm_term=soccer+battle+game PDF link annotation
    • https://lonuxomefuju.weebly.com/uploads/1/3/4/8/134871759/xopepatabulez.pdfIn PDF document text
    • https://fugomunufu.weebly.com/uploads/1/3/4/5/134586131/313c3.pdfIn PDF document text
    • https://natedutaz.weebly.com/uploads/1/3/4/8/134850225/99725553ec7.pdfIn PDF document text
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/katajufidimov.pdfIn PDF document text
    • https://rasetevipumi.weebly.com/uploads/1/3/4/7/134714044/mejumi_jaliladawawito.pdfIn PDF document text
    • https://wilowepixamu.weebly.com/uploads/1/3/4/4/134476622/7824078.pdfIn PDF document text
    • https://gabinomila.weebly.com/uploads/1/3/4/7/134763369/sizusupudotetol.pdfIn PDF document text
    • https://mazokaru.weebly.com/uploads/1/3/5/3/135303974/bbcf712e8c5f.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/761658.pdfIn PDF document text
    • https://xufiporugagom.weebly.com/uploads/1/3/4/7/134705457/jegufadoluf.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/1520724.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/6650ad41-0174-4654-8cc6-cdf7ecfea63f/lokumukubedavupuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/268c8113-52ef-4d15-b663-bfc4dbacfd16/rogue_legend_tame_the_wild_2.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_off0000e64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64C 5184 bytes
SHA-256: ba5ee59473d264d18ad58f263d4266419121ec25bd56f233607a1270d0e6696e
font_01_sfnt_off0000f7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DC 10220 bytes
SHA-256: 71ae47f45549f69a5a2eff957b8b40e823468dc0acaaceb87647887bf3e96cdc

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