Malicious PDF — malware analysis report

Static analysis result for SHA-256 94cd92df6de02264…

MALICIOUS

PDF

81.7 KB Created: 2020-11-23 10:30:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 64495913213d18bda8b4064a1a27604f SHA-1: 10f2d1503cc0be2b2c356fb918d6919621cad683 SHA-256: 94cd92df6de02264f9114028ad48f80d03959bf0b729a36a873c5e1c1de8e06c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafficel.ru/123?utm_term=why+was+the+36%252730+line+of+latitude+significant PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5f9e90c9a404c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_5fb2a464aef3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388050/normal_5f928e5c82b7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5f8f1c8d6e723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f8720a099633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_5fa50b21ad6c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387713/normal_5f8f09cd5a255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466368/normal_5fb9e82163153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414866/normal_5fb3474f30f80.pdfIn PDF document text
    • https://nogapixefakul.weebly.com/uploads/1/3/4/5/134590999/5228835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5fba3dcca9d8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370089/normal_5f9a0606754f1.pdfIn PDF document text
    • https://jorogusanige.weebly.com/uploads/1/3/4/7/134715450/pedinamofiruxug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449185/normal_5fb2b3956e15c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418167/normal_5fae055bbbc1a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00A 5768 bytes
SHA-256: e3c3a3367676b82b5138c48c2e9cf3460662ee0c5f2e00fcf3749e26d987eb07
font_01_sfnt_off000103ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CA 12084 bytes
SHA-256: 147251d992af106bea39277a244cbcf4896bcf45ba8331a015ee603ac5fa8cf8
font_02_sfnt_off00012b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B53 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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