Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ccea547335fde3…

MALICIOUS

PDF

102.1 KB Created: 2021-01-15 02:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a215edfe100890cc9cdac533537b2c4e SHA-1: d4ee7df40db9ca3c7811d4c1d5cc8df025a830c2 SHA-256: f3ccea547335fde352651cd4e55729d89693feabff96ebf9457c24118fcbf235
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and disposable hosting, indicating a phishing or scam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • 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://gettraff.ru/123?utm_term=witness+statement+example In PDF document text
    • https://static.s123-cdn-static.com/uploads/4392862/normal_5fffb30578101.pdfIn PDF document text
    • https://ninukiwipovesot.weebly.com/uploads/1/3/0/9/130969879/manibaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383806/normal_5ff545db09f1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5fa1e6f1246f2.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/toxupesefaz_wazami.pdfIn PDF document text
    • https://legopaxazomunan.weebly.com/uploads/1/3/5/3/135396831/6731809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5fe806a6752d8.pdfIn PDF document text
    • https://wutowenejeboz.weebly.com/uploads/1/3/4/5/134599911/tifiteb.pdfIn PDF document text
    • https://vevavosabiwebe.weebly.com/uploads/1/3/4/3/134349804/nakupepiwor.pdfIn PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/mofoladenim.pdfIn PDF document text
    • https://mefupajudeto.weebly.com/uploads/1/3/4/8/134883840/258126.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/xupizewuxere/dragon_ball_super_episode_guide_tv._com.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_off00015527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15527 4952 bytes
SHA-256: 3c6f67128c85d5568ffc05a282d61ab365cc4c018bd77cebf34107cc87433643
font_01_sfnt_off000165fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165FE 11000 bytes
SHA-256: 64484b680f56cdc99820da63a0a01209e3d6960faec6ef2d1b86144665526957

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