Malicious PDF — malware analysis report

Static analysis result for SHA-256 b56ac69a37700d9e…

MALICIOUS

PDF

76.0 KB Created: 2020-12-24 08:21:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4029128b3804b33848c40aaf02d937fd SHA-1: aa1e4f1152ee5a32f46e4359cf253e5902f4c37a SHA-256: b56ac69a37700d9e63ac9d20416e0d8c9c15ccd1910c33df4e972578cf091258
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although no scripts were extracted, the presence of malicious links and the document's deceptive nature suggest it's designed to trick users into visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffmen.ru/strik?utm_term=crime+city+police+driver+game+online In PDF document text
    • https://cdn.sqhk.co/fidapulano/agjDmux/tikisisazixiresimesi.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/dAB2gj4/51608231030.pdfIn PDF document text
    • https://cdn.sqhk.co/gopefovepagi/Jifa2qk/jubekugabixesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5f9cea5eb3342.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/Fgcyjb3/ping_pong_table_size_ft.pdfIn PDF document text
    • https://cdn.sqhk.co/muzexeragod/iPOGihf/gufafozarabufozigol.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/ihZVmkq/jipabuvefuxizutasivonar.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/j4jYjhy/67207676951.pdfIn PDF document text
    • https://cdn.sqhk.co/lizupasepafu/jgiagjQ/69546200396.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/miwolezedubujoz/words_with_ain_at_the_end.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/99697848802.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/kinemaster_diamond_chroma_key_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/morphology_and_classification_of_bacteria.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/aveny_t_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/bizowegu.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_off0000ec40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC40 5280 bytes
SHA-256: 3550d1329efc1d4418539e5a301cef2a7205d22a9bc9b5ed41f00edda6844e30
font_01_sfnt_off0000fe2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 10880 bytes
SHA-256: 589b4a2c91024ca6672558b600654981e093ad0f5b8d2c234c5909b6fd11144a

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