Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee0b4f1e91f138e…

MALICIOUS

PDF

84.9 KB Created: 2021-05-15 08:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 853c40e29367abd7ee445e65055fee7c SHA-1: ed9f492a708c115eeab0f7c10b97bab248d1cb9c SHA-256: 2ee0b4f1e91f138e88ef788f6f8cc396d49cab3475dc32692de2ffe540f8d55e
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

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://xajibur.ru/strik?utm_term=canon+remote+controller+tc-80n3+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462374/normal_6043fb21716a3.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/tuvaja_rafen_koteser.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451762/normal_5fc7be5a84e3e.pdfIn PDF document text
    • https://disesusobabetom.weebly.com/uploads/1/3/0/8/130814900/siwugirugikejat.pdfIn PDF document text
    • https://wudowured.weebly.com/uploads/1/3/0/8/130873715/gijig.pdfIn PDF document text
    • https://fopabitibomasad.weebly.com/uploads/1/3/1/8/131857723/gopuzobijexevad-woxaz-walepivuwenal-pejobujetubizar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_601cf76c1dde1.pdfIn PDF document text
    • http://foriponawu.iblogger.org/why_my_hp_monitor_keeps_going_to_sleep.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/afb226.pdfIn PDF document text
    • https://xelavizagak.weebly.com/uploads/1/3/5/3/135325118/wufafonom-wufagijijujeke-jemewof.pdfIn PDF document text
    • http://rodupokikoxozed.22web.org/song_hallelujah_by_jeff_buckley.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410433/normal_60336556d0913.pdfIn PDF document text
    • https://riguniliwegab.weebly.com/uploads/1/3/5/3/135342973/5604acf.pdfIn PDF document text
    • http://labozozirakeko.22web.org/98622510306.pdfIn PDF document text
    • http://rarafon.iblogger.org/brahmastra_film_songs_free.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/xugigabitulu/skyrim_xbox_one_tips_and_tricks.pdfIn PDF document text
    • http://fusizukokumov.epizy.com/lipapogawupuga.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/bheema_telugu_songs_ringtones_free.pdfIn PDF document text
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_ccdcecd586f54ac89f4a13b008ad1a75.pdf?index=trueIn PDF document text
    • https://5057b38b-f250-4925-a5fd-2dbc054a2c1f.filesusr.com/ugd/25ee37_d6c11030becd40a181d5aec081777602.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF702 5204 bytes
SHA-256: 87e0c209cdb592a215c05cd123ad27a879272d4be3760497b14352df26c2eb85
font_01_sfnt_off000108a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A2 11260 bytes
SHA-256: 4990d341ca9d638c595718bc3c21e0422865a4646c58e1120768742bdf3e2465
font_02_sfnt_off00012f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4E 16704 bytes
SHA-256: 39c7f27a86fdd55ccb8bf5ca5bf9f8a436ffa3574a4bd78d3cd2104f95afcfa3