Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f88bbd4d6ab2d3…

MALICIOUS

PDF

65.4 KB Created: 2020-11-11 04:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fad46b41f128e474fc2c60a97ff729eb SHA-1: 170e3347f638958f19cb26283e2bcf5a0d8d0133 SHA-256: 32f88bbd4d6ab2d3c31db74797bece0e0431d0e89b9405611035b3014d761e39
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/strik?keyword=minecraft+jar+file+editor PDF link annotation
    • https://rigitugatelimo.weebly.com/uploads/1/3/4/1/134131632/duvipemopek.pdfIn PDF document text
    • https://defejeve.weebly.com/uploads/1/3/4/3/134386135/gipemodisul-kokapusow-sategikoxun-kobonop.pdfIn PDF document text
    • https://lejigatoni.weebly.com/uploads/1/3/1/8/131871980/9050911.pdfIn PDF document text
    • https://nugekepujipa.weebly.com/uploads/1/3/4/3/134318644/basitedaxe-kalujasanu.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/5332410.pdfIn PDF document text
    • https://gazapaxinu.weebly.com/uploads/1/3/4/4/134475358/vokututisavar.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/vifusorogobij-jetavivexijux-fitonapa-fisixawitepatev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a8dec01-ce82-46cd-90f1-a9688d2ea3d6/traditional_gift_for_26th_wedding_anniversary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1f4398-c7ed-41a3-a0e2-e3a82745432c/dead_by_daylight_halloween_event_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/maplestory_monster_collection_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/7571705759.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_off0000c374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC374 4916 bytes
SHA-256: f037e8feeaddb5de2584fb9a4c6efbcb7d6c07b5d2fda93edf2fe17b4d6cf034
font_01_sfnt_off0000d44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44E 10908 bytes
SHA-256: eb6e003145eee3d4b2162add2510bb8a9ae74d54a9354e6b04ac5bfe0ec66bd9

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