Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60079fde444e179…

MALICIOUS

PDF

62.9 KB Created: 2020-11-20 13:26:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1b0871b021de607cd78e469366ff19ae SHA-1: ee4e6b9bd1127026f8521106f0ea81818ddf3ad3 SHA-256: a60079fde444e179d3fce0e26a81b73e948e8f4d29ec91fb2c272b2dcdaa89ba
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or redirect users. The embedded URL 'https://trafftec.ru/strik?utm_term=art+modeling+studio+lolly' and the heuristic 'PDF_SEO_LINK_FARM' indicate a strong intent to redirect users. The ML classifier and ClamAV detection further support its malicious nature, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/strik?utm_term=art+modeling+studio+lolly PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481163/normal_5fadd1345c593.pdfIn PDF document text
    • https://dokipodaj.weebly.com/uploads/1/3/4/3/134306773/82535309c.pdfIn PDF document text
    • https://kugakisan.weebly.com/uploads/1/3/4/3/134390280/9941463.pdfIn PDF document text
    • https://pejusokipa.weebly.com/uploads/1/3/4/9/134902294/fesas_tafedinisoti_salus.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/wuropu.pdfIn PDF document text
    • https://nagifinapu.weebly.com/uploads/1/3/2/6/132696111/xejiwex.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/luropi/crock_pot_manual_slow_cooker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca518ab-28a2-47b1-b2ac-71681a01c0d7/john_wick_free_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ce2e6a-5103-4105-a290-ef9d0315a2c4/39026208134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67602617-0f95-4113-a641-f1d988a55bce/51822249004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21098a0b-7c34-4836-9b83-6429cb26ba7c/ewave_wine_cooler_mcwc30mcg_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109e269b-aea8-4a11-95db-49843ab66ac2/analisis_estados_financieros_libros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e005faa-d750-4d9b-b350-df9cd48e1d76/banco_bicentenario_en_linea_nueva_plataforma.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EF 3480 bytes
SHA-256: c8d87e9150e3cb65abc2427fc77ddb4362b5652e4710e4e8a04c88d57ba932d4
font_01_sfnt_off0000bd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD50 5024 bytes
SHA-256: 59920fca8fec8d42c02e347b763c2bf635da59b20a563f9dae7979c2a88f6f20
font_02_sfnt_off0000ce59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE59 9272 bytes
SHA-256: c2ae5ecb19ca03d57a3fb5ea6794132f724272347d642fd06ec18dd4c88a0b00

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