Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e13867043bfc23…

MALICIOUS

PDF

75.9 KB Created: 2021-03-19 01:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7a85bed9fbe96c4d552fca3762e9225 SHA-1: a4f83abbc0af6b1f7599d475ad34e2a7fbc50792 SHA-256: 01e13867043bfc23c64fc28515beebd894baa4107d6b7b45bfff723464921844
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external URIs, 'https://bologen.ru/award?keyword=le+train+de+nulle+part+pdf+gratuit', suggests a lure for free content to redirect users to a potentially malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/award?keyword=le+train+de+nulle+part+pdf+gratuit
    • https://dosidebeg.weebly.com/uploads/1/3/5/3/135318632/a21293a.pdf
    • https://jokilexagazoxo.weebly.com/uploads/1/3/4/6/134602179/9000093.pdf
    • http://wafolifinibi.22web.org/wordly_wise_3000_book_7_lesson_2_answer_key.pdf
    • http://figokufo.iblogger.org/bopaxubezuvemigewonebaza.pdf
    • https://cdn-cms.f-static.net/uploads/4366302/normal_6051141754706.pdf
    • https://vuminuzatadabem.weebly.com/uploads/1/3/4/3/134311796/sukukiredexipas_bigaposivu.pdf
    • http://fusizexa.22web.org/sutimovumolarejukosipex.pdf
    • http://vozaxakinexu.iblogger.org/vudarojetijaze.pdf
    • https://pakotoroxup.weebly.com/uploads/1/3/0/8/130815058/166736.pdf
    • http://lexulepi.22web.org/dinunamegoreserekotigiwe.pdf
    • https://cdn-cms.f-static.net/uploads/4481164/normal_601112396de39.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_2de363ede278435285cc20f0c68a4473.pdf?index=true
    • http://sikekuji.epizy.com/best_time_capsule_subnautica.pdf
    • http://pexefenebize.epizy.com/appium_robot_framework_android.pdf
    • http://wemiwapava.epizy.com/uke_chords_chart.pdf
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_0f4ef500999549fcbc0cb3f611ad8b44.pdf?index=true
    • http://tumapaluk.rf.gd/rational_functions_examples_with_answers_real_life.pdf
    • http://towudigumiratis.rf.gd/comparisons_exercises_intermediate.pdf
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_0498570074694748b754db87d9e42231.pdf?index=true
    • http://darelarara.epizy.com/dermot_kennedy_lost_sheet_music.pdf
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_db86ca9d62994275a7b2ec8e65f688fb.pdf?index=true
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_671e822bcd1441f3bfa107743460f1c5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc15.bin
24d27181307d4a04049fc2a4f08da7e891801ff3946bf3d0d4d3da3671cf45a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC15 4744 bytes
font_01_sfnt_off0000ec37.bin
144c28b1da22c3c917f5f921fb5ed44920feda7262a0820207b07699cc510759
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC37 11780 bytes
font_02_sfnt_off0001126a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1126A 4324 bytes