Malicious PDF — malware analysis report

Static analysis result for SHA-256 becc12ef32673f79…

MALICIOUS

PDF

70.7 KB Created: 2020-12-27 19:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e298e5f05cfe7208ae2dd14ef4bd169d SHA-1: 65e5d605e44543327390d8d5766af0c4e36a41f6 SHA-256: becc12ef32673f791cffb87036a3768e96b4ca02643e5fd8134b6d9e2b2c8e86
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the embedded URLs are the primary indicators of compromise, likely leading to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://traffking.ru/strik?utm_term=word+challenge+word+puzzle+game+for+free PDF link annotation
    • https://zowukabizuvor.weebly.com/uploads/1/3/1/6/131636697/fazorewolerafozew.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/gh6vJje/87056868784.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/4557862.pdfIn PDF document text
    • https://poxixarusel.weebly.com/uploads/1/3/4/1/134131789/a2cf0c38.pdfIn PDF document text
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/zedabimitis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461205/normal_5fceb91d038d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393626/normal_5fb7fdb7558ec.pdfIn PDF document text
    • https://cdn.sqhk.co/jepipovi/R5qiagj/original_vintage_motor_racing_posters.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/fijhjPr/hideaway_pizza_stillwater_closed.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/kavalukato/34879086036.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/43414222692.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/jimixo.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_off0000d7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CF 5548 bytes
SHA-256: 97ae355300e81358a85b9d7f52cfbf3f53c6063957e062059ec4842469d98d3f
font_01_sfnt_off0000eab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB0 10296 bytes
SHA-256: 70a9de847e4a85eb7af167175f17ecae0fa7c25a7d61257933eef5fcebd4cc7b

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