Malicious PDF — malware analysis report

Static analysis result for SHA-256 27baf910dbb77f66…

MALICIOUS

PDF

81.9 KB Created: 2020-12-02 07:04:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: cfbbab84e98daaf75f5ae3bfcb630478 SHA-1: 9411e0b06e2ee9b29c01196e070efe54925b1a82 SHA-256: 27baf910dbb77f660d1bc3f631885858d1d11c17fa8b7da3df439c2e715be543
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-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://trafffe.ru/strik?utm_term=rip+ie+cork+death+notices+today PDF link annotation
    • https://mowolonob.weebly.com/uploads/1/3/4/8/134874237/fufoluwufogamov.pdfIn PDF document text
    • https://pizolixes.weebly.com/uploads/1/3/4/8/134874149/37abc687cbff2.pdfIn PDF document text
    • https://fusefediwotedi.weebly.com/uploads/1/3/4/5/134589876/165ca.pdfIn PDF document text
    • https://zopatiselinijil.weebly.com/uploads/1/3/4/7/134758238/8478951.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/4925866.pdfIn PDF document text
    • https://sefusozikoju.weebly.com/uploads/1/3/4/3/134366316/8bbd88cdaf.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/5fbce344be7cfc36344e8aaf/t/5fbd2c53660d3b5ffdb59922/1606233172800/90639427568.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffc42bda9c57a97b92422/t/5fc14c71f3de5e49b5946db4/1606503539443/goosebumps_calling_all_creeps_dailymotion.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/bukepejanamuvurezejanus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ab97405d5340f34a42aa/t/5fc6cf967995075abdcfbb81/1606864794982/sesipubumikepetuxup.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/masaxopivebava.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57cef12facd59cecc0b9a/t/5fc6eea1e2dcb1274de0d61f/1606872738843/hide_speakers_behind_wall.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d67b8ef7301f8b106140/t/5fc41652e6d49a06bb1267ae/1606686292144/mefatuxexawese.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_off00010432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10432 5300 bytes
SHA-256: 27aface4df3a5162c0baf36482e3b4b3f76ad6606f18e02bc2674dc92db86fa6
font_01_sfnt_off00011640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11640 11084 bytes
SHA-256: bb8d0444d8b9a5d6bb1bde8127a626d97b7cc3b0136faa1b1655b4a341d97aca

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