Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb099e9bfbdcd90…

MALICIOUS

PDF

72.8 KB Created: 2020-12-01 01:19:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c3ab492e60a7ac86f32ac8a8875af9ab SHA-1: 1ee5da95a33e1b950fd38c4512f85f6131b29b8d SHA-256: 8eb099e9bfbdcd90c43d2a21e81d1d9251e8eb3f70e0edf75afc3b21a6c9a9c9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. One embedded URL, 'https://traffine.ru/strik?utm_term=image+8.25+elliptical+manual', is particularly suspicious. While no scripts were extracted, the PDF structure and link farm behavior strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/strik?utm_term=image+8.25+elliptical+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448744/normal_5fb8864017517.pdfIn PDF document text
    • https://voligamaxe.weebly.com/uploads/1/3/4/5/134512074/5373230.pdfIn PDF document text
    • https://gebulofafilo.weebly.com/uploads/1/3/4/7/134717894/660299.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/tipirikuduk_dusufitizibobil_xexekod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f88bb18c3695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420589/normal_5fc28d3cf2642.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/fatezub.pdfIn PDF document text
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/levomame.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466154/normal_5fa4e62f0d2da.pdfIn PDF document text
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/077668.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/119094.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/acec926f-ab02-48c9-a1ff-d5ccb5649f79/nba_2k12_ps3_gameplay.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/71158532958.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/happy_birthday_wishes_song_masstamilan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eedc78d-19a1-4d01-9f9d-cf2cceda1d00/76344512460.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_off0000db9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9B 5400 bytes
SHA-256: d90c1dd78417e9f74e4f659ee8619e8e23e5a5f8bc70f79fd2aa3b147dda3b5a
font_01_sfnt_off0000edee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEE 12116 bytes
SHA-256: 531400b02ec58a13745c0067661d7e6d275d0be7942d7be632ac3e1515439e33

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