Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1f525c2023f042…

MALICIOUS

PDF

67.5 KB Created: 2020-12-07 21:39:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ce37666b52a46736a43ef2f218c4a010 SHA-1: bff2dc5a53164b9dfa109bd0cb38374337f7d1e2 SHA-256: 3c1f525c2023f0426d1de71fe37a0bd0c6a7c5b8f7b7d3806edf16e1b1e6b98c
156 Risk Score

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://traffnew.ru/strik?utm_term=boat+renaming+ceremony+words PDF link annotation
    • https://dawopebasigu.weebly.com/uploads/1/3/4/8/134886486/6020729.pdfIn PDF document text
    • https://bigififipajug.weebly.com/uploads/1/3/4/7/134709095/joseragak-vukitibujifib-fovefimodo-pejobomarojusom.pdfIn PDF document text
    • https://bugemimeme.weebly.com/uploads/1/3/4/4/134403979/zodusowuti_jisuvop_safaji_begagojibunazo.pdfIn PDF document text
    • https://menaxogem.weebly.com/uploads/1/3/4/4/134432074/8885801.pdfIn PDF document text
    • https://furiraduwonejos.weebly.com/uploads/1/3/4/8/134870793/8470522.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/e27909d0be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc013a70a2757459bde56bb/t/5fc0db4b08845d0924aa2cbc/1606474575084/33415909053.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e92c12facd59cead07a1/t/5fc956368cce120d14bbb744/1607030327755/19074713109.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fb6b88c99b6d37a78a63/t/5fc2c36c3485235c8621c005/1606599532895/dunadotadobeginakuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/nufilexi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d96ebd14ff0dd29c6608/t/5fc2f05108845d0924eb1f44/1606611025494/97974584872.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 8

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_off0000cc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0B 5468 bytes
SHA-256: 98c8766c7afff2948fbe002980766dc5bc6fe0432421029779abc690b46be664
font_01_sfnt_off0000dea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA8 10192 bytes
SHA-256: 553d6fd0b2761b20eec0ff2284977eaee48fab182eb4884716f9a7c15d588c96

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