Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf316afc0215d18…

MALICIOUS

PDF

67.2 KB Created: 2020-12-21 22:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3f5f299766c76ddbdd6797ed09dbd2b3 SHA-1: 7cfe06e8be513e746b66041668a74f779ecfbec2 SHA-256: eaf316afc0215d185752460d1db71f304aa35ea25ff5e9c4e55c01fef9e2697a
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/123?utm_term=classical+myth+powell+8th+edition+pdf PDF link annotation
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/xidilofig.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/f377059bf474c3b.pdfIn PDF document text
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/45185b36c6d657.pdfIn PDF document text
    • https://menaxogem.weebly.com/uploads/1/3/4/4/134432074/dusefomuxez.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/8269495.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/5293624.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/hoover_quick_and_light_carpet_cleaner_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02eab240-d62c-4ed5-b4a5-b698708273a1/zudexevederesutesin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd7f1263-864a-4652-9abb-e3db7a31bc6b/41399800108.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/jewuwibenadoganisemexef.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/64959814028.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf49f1f3de5e49b55a5d52/1606371825303/83285306158.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e9962bbd74065813b99d/t/5fc4a1664e98326c02a47c1e/1606721894799/galukexuxanitetixifebuzik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD2B 5500 bytes
SHA-256: 77a095b3ec4c5f8d3cf30f90a59501bac740768be5363861efce7b9ac80b4c86
font_01_sfnt_off0000cfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDB 10012 bytes
SHA-256: ac3f0dde27f2c82f6725d33bb9b53257d858b2fda106f8bc676d70c272e789d3
font_02_sfnt_off0000f1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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