Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2269a73ddee4fff…

MALICIOUS

PDF

69.2 KB Created: 2020-12-23 05:49:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aecf0195e70a45bfe50ec926a5adb3e1 SHA-1: 95bdb28507ee638af4953a5dfc758f92dd81ef45 SHA-256: d2269a73ddee4fff2782f9bc9a15be61188c73413258868a221d3307a10a0ede
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-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.
  • 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://traffnew.ru/123?utm_term=best+race+for+warlock+vanilla+wow PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460048/normal_5fc8d159e1245.pdfIn PDF document text
    • https://ronupajowosoza.weebly.com/uploads/1/3/4/8/134871490/8754470.pdfIn PDF document text
    • https://lolaxazexujobiw.weebly.com/uploads/1/3/4/7/134762367/696b68111.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464052/normal_5fdee877e4aa0.pdfIn PDF document text
    • https://vidajubobulixi.weebly.com/uploads/1/3/4/6/134650234/gupuwe-guxawosar.pdfIn PDF document text
    • https://taruzabob.weebly.com/uploads/1/3/4/4/134493447/majaputevelila.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/9314607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5fb4e736b0e28.pdfIn PDF document text
    • https://xazonulukobimov.weebly.com/uploads/1/3/2/7/132712199/f5f53ab388d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5fc075270ccf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426059/normal_5fa737d2e6152.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/5fbdee2feaf37e3b64609b5e/1606282802623/zing-ci_leung_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/zepudiloregis.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/datinonaputexiraxanixa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf3fd96394b41d6426e7a7/t/5fdfa741459323513be72395/1608492866583/15919018982.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_off0000cdc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC6 5140 bytes
SHA-256: f82fd5435c42d1285eb8c1634170f77615129b013581765abebaaf93e640dfdd
font_01_sfnt_off0000df6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6D 14052 bytes
SHA-256: 218743d0ba4ffe7c5009913505208e9b171e36290e2285d4d8be57142f9e7369

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