Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f06713e61f2044…

MALICIOUS

PDF

70.4 KB Created: 2020-12-29 20:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c6084de4a4dfaf08a8b6427983c1fe3a SHA-1: 7bddeea69166a60b2ca73efb8b9d2ee5e0cca338 SHA-256: 25f06713e61f20443879ac3ca78c84b53ab0e250d7432389c64083fbbc5c0766
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to redirect users. The presence of external URIs and the overall structure suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

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://trafffe.ru/strik?utm_term=mr+wobble+drop+killa+lyrics PDF link annotation
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452626/normal_5faa3a75e8267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413712/normal_5fe3932ab4bb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384325/normal_5fc62e9ae786a.pdfIn PDF document text
    • https://segamovav.weebly.com/uploads/1/3/4/8/134892249/e5d9ea.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/zodemitedulup_kowokinenuxa.pdfIn PDF document text
    • https://xamegazu.weebly.com/uploads/1/3/4/4/134440804/5326523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5fa8f85d957c0.pdfIn PDF document text
    • https://lifafogiter.weebly.com/uploads/1/3/4/3/134321186/viwiwapidu.pdfIn PDF document text
    • https://tufanemoxidubux.weebly.com/uploads/1/3/4/3/134315727/gunudofukifoza-geguk-jixagob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454668/normal_5fc62b6f9019d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3bd71bb-8924-4628-90f1-a29b258a4e65/moletobasile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/870614e3-8310-4d06-8dbb-886134aedb2d/words_starting_with_qi_words_with_friends.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38e3d161-255d-4ee2-acce-deb9ff28ca96/feudal_japan_sengoku_period.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_off0000d6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BC 5468 bytes
SHA-256: 9ee1ef006caf442b450a3499367ee644b1602b9858fbd55673b9709e546f34dd
font_01_sfnt_off0000e984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE984 10340 bytes
SHA-256: fe9047795797aca4613f57d56f2c8e369126ab59422529aae16f8e8c2962efb2

Open this report in the interactive analyzer, or submit your own file for analysis.