Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c33f2bc3005773…

MALICIOUS

PDF

73.8 KB Created: 2021-02-02 07:56:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 78229ffe99b9546f6a77508e617f2a09 SHA-1: a5d57a0bd38ed5336d6d75a75e3a33a45ef3c050 SHA-256: 88c33f2bc3005773ff8135ec4302116d7cadc4fea2d4c4cad116d5b3370716c2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL pointing to a suspicious domain associated with a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to drive traffic to various sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://bologen.ru/aws?utm_term=cara+file+pdf+ke+word PDF link annotation
    • https://lupamotikodoja.weebly.com/uploads/1/3/1/4/131406453/nesopa_kutidafazejiza_vexutejijoz_rutufanigofuwef.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/rZFEhgN/kugikedotek.pdfIn PDF document text
    • http://complerbnp.com/partida_doble_ejercicios_resueltosd8649.pdfIn PDF document text
    • http://imm-shoes2.club/lewiviledakemixvhv.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/Lhjjfgj/insaniquarium_deluxe_feed_fishes_fight_aliens.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/ghcDjjM/heart_failure_project_ideas.pdfIn PDF document text
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/3072223c.pdfIn PDF document text
    • https://suxutusebosogu.weebly.com/uploads/1/3/1/3/131379987/tusaz.pdfIn PDF document text
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/vakiwefikigule.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/minabiwa/child_and_adolescent_health.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/41719530828.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/zokufisojesatovusa.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/69063990337.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/74044212135.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/87214742907.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/mogebadanajapawodulani.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/xenatebekilopa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E9 4916 bytes
SHA-256: f254f1079da91ceb643325fc8eef3fa4caefd23ac3a1602f0f63a604484ecc1b
font_01_sfnt_off0000f5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C9 10572 bytes
SHA-256: f58ac6593c7d7616f8e1d45f5102586e19288aaeba9ea1c38e9b380c8b7b709c

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