Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7176142a327f09…

MALICIOUS

PDF

90.2 KB Created: 2020-12-28 15:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 67e0cecfbf5f6fa6be4a1d087194e1b4 SHA-1: 05ed8a2f5828c6f9b36bae55ce1feebc358e8af2 SHA-256: 7c7176142a327f09b904ccf49a87dc8c8a8225c243d63c63ce8fccf3bd145140
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://traffnew.ru/123?utm_term=pokemon+y+location+guide PDF link annotation
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/mokolewagake_wipabufuzigiwa_segafurisudu_simazo.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/4333295.pdfIn PDF document text
    • https://didunoduwogu.weebly.com/uploads/1/3/2/6/132682107/zosupujugizigugiruv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_5fd9dbab4a0e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410015/normal_5fa9ba1b7341f.pdfIn PDF document text
    • https://wanujonoguj.weebly.com/uploads/1/3/1/6/131607110/tazadaxi_xotamivajinoku_lokunarupubug.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/sonevakuvaniwativu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_5fe48f5a35294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f87d7db2b4bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388839/normal_5f90bc0016c96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495246/normal_5fc5e83115fb1.pdfIn PDF document text
    • https://dulumomotuvubu.weebly.com/uploads/1/3/4/7/134759228/zolepavokomi.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/titugome/vegemobalimuba.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/68753811653.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/zuzodupur.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_off00012413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12413 5152 bytes
SHA-256: d561ee21c0376ce593d8f66d82400c5d1f3f2b4abed1aecca255751ee74bf27c
font_01_sfnt_off0001359d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359D 11228 bytes
SHA-256: fd29c2319808cee656471c90b03e26dd5e749d9397765b542c35f4a4252681b8

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