Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0bb1163174691f…

MALICIOUS

PDF

84.7 KB Created: 2021-03-20 23:05:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed7c8ebbb361178c8bace78baaa7f0de SHA-1: 9893807908b7073371871bd941b6bd3da0f8020c SHA-256: 2e0bb1163174691fdf88fc790f2adc0f91a2d14665318ca77bf3e67085d611c6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, forming a link farm, with one prominent URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were extracted, the PDF's structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/wix?keyword=wgu+readiness+assessment+test+answers
    • https://cdn.sqhk.co/konafomaz/GhfqFha/best_funny_instagram_captions_for_selfies.pdf
    • https://cdn.sqhk.co/nawamuzimosu/ia49iiM/nosebux.pdf
    • https://cdn.sqhk.co/josurowelimu/idqygjO/animal_worksheets_for_high_school.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wupixufekijax/bali_vacation_guide_and_tips.pdf
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_62b1c26c1e1e44eea9a84158431fa0f4.pdf?index=true
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_f5f8f165a6e9437988026cf04c4b8d4d.pdf?index=true
    • http://mixawulemago.epizy.com/alia_bhatt_songs_pagalworld.pdf
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_2e2b5d6565e44edba5d8c9b563794ff2.pdf?index=true
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_be75872576094ccbbba051760e11e97b.pdf?index=true
    • http://nijozemujag.epizy.com/gewinudosilizogegipiniwig.pdf
    • https://s3.amazonaws.com/tamobalasu/xonamejozowodeme.pdf
    • https://06b91503-bda4-4bbd-a69c-520552d4e402.filesusr.com/ugd/07c5d0_edec8f8ae50441dd857cf7270d35d0e8.pdf?index=true
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_922826a8eb4a4d30800ca723f6a1e43c.pdf?index=true
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_4659e98f62aa419a9876c5cb9bd656f0.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f80.bin
ff624028fde2ec30c8935ac49a4d3b8f727b63c3f4867c1d04c2ef48a442c8e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F80 5216 bytes
font_01_sfnt_off00012142.bin
e6fe07c9ddd50db703cf9f81a3e99e77eee07b19dd96dc4eaacae0f0219d3e27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12142 10788 bytes

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