Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5762fc34da60dfd…

MALICIOUS

PDF

67.2 KB Created: 2020-11-30 04:31:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 383458567b62ea6d01efcfdbfb21476c SHA-1: 10b6363bf2551eb718a08a9e7d84da63ba117164 SHA-256: f5762fc34da60dfd8ecba7ad85dbb0f07ae25ef1bbd2c3054056c85f527264b7
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=victor+frankenstein+quotes+about+playing+god PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387219/normal_5fa249c54a19a.pdfIn PDF document text
    • https://jojawetoterul.weebly.com/uploads/1/3/4/4/134404105/9eea83af1660e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_5fc26107affed.pdfIn PDF document text
    • https://zusadubojurumez.weebly.com/uploads/1/3/4/7/134703186/6713908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5fa5f38a38de9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5fa7b11e65da2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_5f8fd6a8ea341.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/jomukirenetalezatobi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413976/normal_5fa01b7a155b7.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/0510e770fb99.pdfIn PDF document text
    • https://xitofubipu.weebly.com/uploads/1/3/4/3/134375163/pokepipa_fokesajinegu_nimotemuneto.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/04817e25-0ef1-4afc-bcda-73683e5cdbe6/dilaneva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30050121-1062-48f0-854c-3a9aa22304b5/79201562307.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_off0000c9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B2 5720 bytes
SHA-256: 64401f47dd0112e3a6419303a8748fa6f7ee189b0095e485f407ff2f3dc0f28f
font_01_sfnt_off0000dd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3A 10116 bytes
SHA-256: b760ad70de2f67f2aff61ffa77954bb3fc3aa71e0ca896f8c38597f3dbbef04e

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