Malicious PDF — malware analysis report

Static analysis result for SHA-256 9502b2250574d737…

MALICIOUS

PDF

69.1 KB Created: 2020-11-21 08:09:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 40e5bc7fec4d668b296249059e97ba94 SHA-1: 099f94a0e6491e4f39656f8ace5356e227294490 SHA-256: 9502b2250574d737abaf1436669bc823aa4e93f823b4674a43d5e7d9db864a13
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://trafftec.ru/123?utm_term=spectrum+remote+not+working PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382778/normal_5fa1fc458f08c.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/7989682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_5fb4800d5f41b.pdfIn PDF document text
    • https://febewizonobuwom.weebly.com/uploads/1/3/4/3/134311996/5085862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378836/normal_5f8b85270c93f.pdfIn PDF document text
    • https://juvudunepuzuvo.weebly.com/uploads/1/3/4/5/134513453/9071098.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/lozeneri.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
    • https://s3.amazonaws.com/xabalaru/39782138781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43baf425-6329-4bc3-91a1-05b1efe4a193/togasuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fcadb2-0e7f-4d11-8bde-e1c85cc67081/nigipoxoregiz.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/30296230950.pdfIn PDF document text
    • https://s3.amazonaws.com/degerutisig/act_205_actuarial_valuation_report.pdfIn PDF document text
    • https://s3.amazonaws.com/juxatop/ruzivotoxubixememeremarit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC614 4976 bytes
SHA-256: 4980e6d47e0631e1e1200b853b2d34dc785e2e8f7c91e4cbe06e1c17cab2c24c
font_01_sfnt_off0000d703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD703 10184 bytes
SHA-256: a8065963952a35b292d41a909acd376ebfa3a0be42930385bf8ecbb2e8330fa0
font_02_sfnt_off0000f9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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