Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eca6fc7236f1a5f…

MALICIOUS

PDF

69.5 KB Created: 2021-06-07 08:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8dfdf42eba7f51aa98a2c7c6a81a3dd0 SHA-1: 42f08187879fd5c3a7e3306116124bb473b43343 SHA-256: 6eca6fc7236f1a5f8b9d9b0304ed9effadf7b8cbd9b0caef40a69dd0435274e8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' point towards an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://wastran.ru/pbw?utm_term=200+prize+bond+list+2020+faisalabad PDF link annotation
    • https://xedijekotaz.weebly.com/uploads/1/3/1/6/131606072/nuloxawejixapur.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/ropejufemej.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4505159/normal_60b491ff95523.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4488330/normal_60b4cda120d12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408596/normal_600c8f7f252a1.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/0cc95596.pdfIn PDF document text
    • https://nagaleburanab.weebly.com/uploads/1/3/4/3/134379557/97b576a849112.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490264/normal_5ffeef2d5fc91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414848/normal_5fcd9d4c793ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478414/normal_601faa82aa4a9.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4366374/normal_60b1c71a6f096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491705/normal_602b3b2a139c1.pdfIn PDF document text
    • http://www.hamaraquetta.com/login/rurl/L3ByaXplYm9uZC9ib25kLzIwMA=In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pugaxigodaka.pbworks.com/w/file/fetch/144658371/rovesiduxudatalilepavime.pdfIn PDF document text
    • http://funinupun.pbworks.com/f/20294728823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d51a89-d2b4-4302-ab73-fc078a148598/wateromituzuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a482bd8c-d3d9-4d99-b761-cdd0f1114f6c/nordictrack_x9i_incline_trainer_treadmill_reviews.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144415359/4963700852.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_off0000d268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD268 5404 bytes
SHA-256: 3ca7d93524839f9903a1c9644061651e9020ab08cb2d5dda604e8eaccb5932e9
font_01_sfnt_off0000e4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D0 10668 bytes
SHA-256: a78586b2b9f066984093403a11c4da8877c994639d477eebcb8959731846f9ef

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