Malicious PDF — malware analysis report

Static analysis result for SHA-256 192d99ce77b736b6…

MALICIOUS

PDF

70.9 KB Created: 2020-12-23 23:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d3fcc74b633903929fbcf6b9199643a6 SHA-1: dd2ec0edf61cbec01251efef0a4c649e5c4120fa SHA-256: 192d99ce77b736b6121749b538bee9886392a7a667db41c5a07b81e90a108a2c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffine.ru/strik?utm_term=3d+bowling+games+free+download+for+mobile PDF link annotation
    • https://cdn.sqhk.co/wetotuluxe/MaAihzS/mugofafo.pdfIn PDF document text
    • https://luvegiramoki.weebly.com/uploads/1/3/3/9/133986347/volizav.pdfIn PDF document text
    • https://vasigigu.weebly.com/uploads/1/3/4/6/134607878/minivovaw-jikexusoligib-dewib.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/2166863.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/cjaPihg/lucky_life_number_8.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/givuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387408/normal_5fe0cefc20e78.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/719acc14-cbf4-4458-ac43-e26800b66f97/dalujelajujapejirisumurop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a42c3148-de8a-4834-97d6-d954d633f5da/83516977034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e20e7feb-c970-43df-a8d5-e204b86b12c6/jatufuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0718f0a2-7d0d-4bd9-9a8d-1327ef6eede5/nojirefulajizominewulosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c6deed-a554-426a-b263-87562dee7902/ati_radeon_hd_2600_xt_512mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff5ea883-9177-406c-b302-6be03f47cb70/73110653226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f04388-23cb-4dd5-a8ea-f2fea805580c/gixedopufewukej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54136a9-6c50-41ea-a714-f3eee071f02b/91939391140.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_off0000d8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CF 5528 bytes
SHA-256: 502b99ea212467639bd54730a7a54e4ce3adcf0536cd55d53213e347d30771d5
font_01_sfnt_off0000eb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB99 10280 bytes
SHA-256: d659776bcbc4b75dacbef8c2bef48e8d77272dbc3194e2f75a0a4fe41bbb0791

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