Malicious PDF — malware analysis report

Static analysis result for SHA-256 0099d09d195ba0a9…

MALICIOUS

PDF

84.1 KB Created: 2021-04-03 02:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5d6d38757cb5ada970bd9df4355b595 SHA-1: 8052bd7447a894739e58d92600ea74bb19d7d555 SHA-256: 0099d09d195ba0a9bbc76bf69acc7cddc38b6bc7e6213a5eda75598eae698254
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'dafemum.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/wix?keyword=visceral+maya+persona+3
    • https://cdn-cms.f-static.net/uploads/4420902/normal_6045ee828ddee.pdf
    • https://cdn.sqhk.co/sugefixa/whgiejj/dasonagateririzumupixod.pdf
    • https://cdn.sqhk.co/piwuzuberaze/jgdggTD/extreme_car_driving_simulator_2_mod_apk.pdf
    • https://cdn.sqhk.co/raguwubives/dTjfAif/85341291522.pdf
    • https://cdn.sqhk.co/bizufunido/jcOpYja/algebra_1_practice_test_answers.pdf
    • https://static.s123-cdn-static.com/uploads/4452853/normal_5ff558a8eb7de.pdf
    • https://cdn.sqhk.co/jasolugud/eapjfgh/caller_id_android.pdf
    • https://cdn.sqhk.co/kosadara/ihcBghp/9038054083.pdf
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5fd3c2a4838d5.pdf
    • https://cdn-cms.f-static.net/uploads/4413002/normal_5fd379a79463c.pdf
    • https://cdn.sqhk.co/soxesemu/Dicpiim/webtoon_free_coins_october_2020.pdf
    • https://static.s123-cdn-static.com/uploads/4366350/normal_5fe55525c4379.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jopomodilamego/litekabatosedasodudad.pdf
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_e9819f82e196450c87a3ca5fd241283c.pdf?index=true
    • https://s3.amazonaws.com/pigolo/photive_sphere_speaker_wont_turn_off.pdf
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_24c87263195d4ad7ae2e3a182f06ee69.pdf?index=true
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_f51a2073870a4b2b956f8330a1364605.pdf?index=true
    • https://s3.amazonaws.com/loranoduzuja/gusofanetol.pdf
    • https://77ac2d45-d533-4b4b-a85c-01e81860bff9.filesusr.com/ugd/7f1ad7_fb4b2a77aab44afcb0bccf02bb77d14a.pdf?index=true
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_2b28d6649598462fb1e6671bb28b41d8.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_off00010930.bin
1b8cb3451485ff7888ce985abad7b46282b8d1dce2dd438a3d2f9cb9103688fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x10930 5308 bytes
font_01_sfnt_off00011b37.bin
f4e071b6f5c6ef5ddf81d1362a9db7401c11b3ba12b03535afe8df08068ada59
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B37 11744 bytes