Malicious PDF — malware analysis report

Static analysis result for SHA-256 92980ec923a1f36b…

MALICIOUS

PDF

79.5 KB Created: 2020-12-11 12:15:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 34ca5d89b809e1363a6911eb1f24e77d SHA-1: df3ed5fa1ef75e5798944a319be4b63ba9b33bd8 SHA-256: 92980ec923a1f36b1134bb004f7e5dceb37043abd8b075a064167083044cae5a
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 0.9997

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://trafficel.ru/strik?utm_term=best+foobar+skins+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489586/normal_5fbe717897bcb.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/jutozupadi.pdfIn PDF document text
    • https://zenuxemevobimog.weebly.com/uploads/1/3/4/7/134756414/zaviwave.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/a4985bdb-9a58-4c76-a668-c4d1d9c597cc/25982740264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4ec5155-3b98-4871-bad9-110249b16bf9/46236986109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b294e1-3fda-4ab4-90c3-a98ed96a9866/exponential_growth_and_decay_word_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93a89b09-26e0-4ba5-b5ee-0a6088136d4a/air_entrainment_ratio_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d6dbf8f-fc7b-4fdb-bee9-d16c06c552f8/international_economics_8th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/superannuation_guarantee_late_payment_offset_election_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f46f11-048a-4983-aa3d-d98dae9cd23a/72050408579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8558af16-10bc-4bd8-80f3-587c2e154d81/4476671711.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF719 5504 bytes
SHA-256: 498840343dd997792575a6ede74d571f4a863da5d7894fe15b596111c64efd8e
font_01_sfnt_off000109e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E6 11712 bytes
SHA-256: 5cb00232f248a4272f5e3560e783d5e5a3e0813513b7a577ca4cfb9f1eba452c

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