Malicious PDF — malware analysis report

Static analysis result for SHA-256 2becb34d8dc64af1…

MALICIOUS

PDF

69.2 KB Created: 2021-02-08 08:28:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7ab9ffa075d40700598a897161ea846b SHA-1: 0604a9a50fbe918aab58e77798f33a8092a4c017 SHA-256: 2becb34d8dc64af1d1abfe6bcd053ca8cdbbd7764f1ff02ca43dc67249147c52
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with several pointing to known malicious redirector infrastructure and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be redirecting users to potentially malicious sites, 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
  • 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 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://yafferge.ru/123?utm_term=habitat+for+humanity+anchorage In PDF document text
    • http://strapslap.online/77663203807xv4t9.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/gdhhhjD/vuvilaxolijigatu.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/cBZAIjf/77294002803.pdfIn PDF document text
    • http://zalavsky.ru/biology_letters_formatinorz.pdfIn PDF document text
    • http://chelobaka.space/integral_quantum_hall_effectfwi6r.pdfIn PDF document text
    • http://kudopifupelixi.22web.org/21909395529.pdfIn PDF document text
    • http://agent-ritual495.online/wuxesipitofoguromfwjb6.pdfIn PDF document text
    • http://logoped-samara.ru/paola_turbay_e_diego_sotorqmxr.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/ahfFlgi/at_t_tv_app.pdfIn PDF document text
    • http://soxezujep.iblogger.org/expanding_double_brackets_worksheet_with_answers_tes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nizalag.rf.gd/rowodos.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/pokemon_planet_guide_money.pdfIn PDF document text
    • http://pexaniruvuwuwe.rf.gd/dinumunoripikox.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_off0000d07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07C 5288 bytes
SHA-256: 016cda1a4e9d468adfad69dead822b8ff3af104525b13d9327bf6f68745cda22
font_01_sfnt_off0000e261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE261 11020 bytes
SHA-256: 02c217ed9664b1f85ed62af16381a8870821e08d324c551cffafeaf3925418a1

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