Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0a189d414579ce…

MALICIOUS

PDF

79.9 KB Created: 2021-03-30 22:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a885f57d0fd4d1f3625a7e0aa31e3ba SHA-1: 5d9aa90e152271af2dd16425ab36d4b8c229c00d SHA-256: 6c0a189d414579cefb63bfd18ac908a8c1718c04b3b2dde03d1274240c20daf1
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing or trojan PDF. The embedded URLs suggest an attempt to direct the user to a compromised or malicious website.

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://seumenha.ru/award?keyword=definicion+de+tratado+de+libre+comercio+pdf
    • http://fofiwafajelerax.sportsontheweb.net/52252015093.pdf
    • http://kudusakepupa.sportsontheweb.net/chemical_weathering_and_mechanical_weathering_differences.pdf
    • https://cdn.sqhk.co/gixotagokezu/aLoigja/wosadel.pdf
    • https://cdn.sqhk.co/fajoliteve/i3jdhjy/planets_visible_tonight_ohio.pdf
    • http://pozufopajosel.mypressonline.com/71377005529.pdf
    • http://xovijezup.mywebcommunity.org/45891178443.pdf
    • http://pazolozul.mypressonline.com/54528177167.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/627309a7-41d4-4312-bfe0-d8acdc334cf5/98280856841.pdf
    • https://s3.amazonaws.com/kigavanus/16242533898.pdf
    • https://s3.amazonaws.com/rikolesafuwofar/vamerenalobafo.pdf
    • https://s3.amazonaws.com/xuvamuba/pululivatetejigoju.pdf
    • https://s3.amazonaws.com/magapeguwabe/geometry_points_lines_and_planes_worksheet.pdf
    • https://s3.amazonaws.com/rodigapigeta/18462311668.pdf
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_1c946b8771734c358ac2eeaf83ffbc0e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b2d21c80-3a3b-451d-8f04-a9b7db6d95a7/gemovuninuvo.pdf
    • https://uploads.strikinglycdn.com/files/60aba700-ee70-4a03-a5be-4a1cfa673c20/computer_hardware_and_networking_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/b3fa156b-5abc-4563-9eac-629f8b9619a5/5872364359.pdf
    • https://uploads.strikinglycdn.com/files/2660e79c-33dd-4302-86c5-11ccf12de33f/48426990038.pdf
    • https://383fd46b-cc41-47b7-9379-19c19d7bb1fe.filesusr.com/ugd/81c43a_acab46d37f384df180a40f5210bbc0c2.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_off0000f8ea.bin
06c82be0bdacdad0d70567b1a15f56dd427c00b3fb01616c13c9313b4093f77a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EA 5260 bytes
font_01_sfnt_off00010abb.bin
254299f0b4333557a291579322f78217810400775d498bdb4f4f7fd5a46c30ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABB 11752 bytes

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