Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c212d95e6ffc03…

MALICIOUS

PDF

67.2 KB Created: 2021-01-18 20:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 83868f44627fc6501fbb6989b9048716 SHA-1: 653216b542d6de4bd06e4e45bfebd3a144c0edff SHA-256: c6c212d95e6ffc03aec8b5e4f1b0e7094b31647595b188fdb95b0db305f91e0b
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a medium-severity rule indicating it's a link farm on disposable hosting. The embedded URL points to a suspicious domain, likely intended to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with 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 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://trafficel.ru/123?utm_term=lol+riven+vs+camille PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487186/normal_5fa8a6f06dac4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468550/normal_5fd2a07fa85a9.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/5665029.pdfIn PDF document text
    • https://site-1180330.mozfiles.com/files/1180330/wejelufapujojowozape.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368742/normal_5ff3a01499a9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381752/normal_5fcb6384c74bc.pdfIn PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/624606b713f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370540/normal_5feed34b551c5.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/5591919.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/mivokozibu/73104985255.pdfIn PDF document text
    • http://tubulufegufixo.rf.gd/75430199366.pdfIn PDF document text
    • http://xelilurezo.epizy.com/dragon_quest_viii_ps2_guide.pdfIn PDF document text
    • http://sejanaxopuvogiw.epizy.com/64140464494.pdfIn PDF document text
    • http://widamifikifewex.epizy.com/wudoniwewozi.pdfIn PDF document text
    • http://zabesawafusoxa.rf.gd/probability_sampling_advantages_and_disadvantages.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_off0000cc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC17 4944 bytes
SHA-256: e4276e360270eebf10a2fdbe5ac17ff4a7601cc9ce354f51ffa5eba1c4e7603d
font_01_sfnt_off0000dcda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDA 10364 bytes
SHA-256: 44cbb9d2a765ae987c646802e09035fe1edc98d24c351eb4c80ab7d6270d6dbd

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