Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9196c254fec520c…

MALICIOUS

PDF

67.9 KB Created: 2020-12-21 14:58:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f0a8de9a495353836977fe0ca7c2a036 SHA-1: d41a222116454c7334dabed083c1d041b35ed8b4 SHA-256: d9196c254fec520c6e94bd6e4db09e07fc19c5baff6d9ea78b88f64d97a2fe1a
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://traffine.ru/strik?utm_term=raid+ant+bait+active+ingredient PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387715/normal_5fc6adab7fb15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499651/normal_5fb6b1afcf1fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421039/normal_5f9c35438010b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5fdafa1d9abbd.pdfIn PDF document text
    • https://mivodijabid.weebly.com/uploads/1/3/4/7/134732330/gemabekogujavujiti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f8737c12f42a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374535/normal_5fdec3042c82d.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/kosamupim/maplestory_commerci_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/fufadukeditimomekojefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7846c4d9-05ec-44be-b72b-d8902cba07dc/puwutemejepazev.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/30146767022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ffd95b7-0a05-4dae-a202-ffad853cb34a/xakavizowusovoxafonog.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/rupotefoxaduwaxefupebuboj.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/learn_english_grammar_tenses_in_gujarati.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_off0000ccae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAE 5104 bytes
SHA-256: 63ebf4148eac2ce5ac643b31d93b292a6de5032c1f1165518a77fe14727971c9
font_01_sfnt_off0000de25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE25 10728 bytes
SHA-256: 61cce71583ab11b866de9de000197daa2b8b8f78fab7e10c796f0926ec65eca7

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