Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a85ab5ac42acd10…

MALICIOUS

PDF

77.5 KB Created: 2021-03-17 05:53:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7078ef817e9967a64cd94156db5ce468 SHA-1: d4b66a02436f52d6c1bd8f0f67953e6e8e7a2631 SHA-256: 1a85ab5ac42acd1059d4e52068293f346a51ac80928e08666671596fcfdf2c9c
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 multiple embedded URLs, with the primary one being 'https://resalured.ru/wix?keyword=pros+and+cons+of+psychoanalysis+theory', which likely serves as a lure. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it's designed to redirect users to malicious content, potentially for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://resalured.ru/wix?keyword=pros+and+cons+of+psychoanalysis+theory
    • http://kabikuli.iblogger.org/how_to_apply_decals_to_car.pdf
    • https://cdn-cms.f-static.net/uploads/4454041/normal_601ca1fe548ff.pdf
    • http://xanejog.medianewsonline.com/pro_angularjs.pdf
    • http://letgtma.bid/what_is_the_best_animation_software_for_freeyv0lr.pdf
    • https://static.s123-cdn-static.com/uploads/4378383/normal_5fed22dc5b886.pdf
    • http://trokot-roznica.xyz/mazemilitia_lan_online_multiplayer_shooting_game_apk_download0nh7u.pdf
    • http://nufivuzelikonax.getenjoyment.net/au_bonheur_des_dames_analyse.pdf
    • http://thechambre.xyz/debegojaxolategomavolexa1ekyg.pdf
    • https://cdn.sqhk.co/jadepibake/elXiaWV/robot_war_gangstar_crime_hack_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4403118/normal_60348d8a43aec.pdf
    • https://cdn.sqhk.co/wukufazujuv/2DijKNj/end_user_license_agreement_for_software_template.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/92013480-b74d-4c2a-8824-81711e2e8be7/reset_nanostation_m2_to_factory.pdf
    • http://lenixad.epizy.com/adequation_formation_emploi_qualification.pdf
    • https://uploads.strikinglycdn.com/files/f9425ac7-fd52-4239-a206-e7889e8d3eb7/79990220865.pdf
    • http://sajoveguduv.onlinewebshop.net/83935981346.pdf
    • http://rusobuxun.rf.gd/19665359651.pdf
    • 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_off0000e72b.bin
d77bcb477ec82ac8f7979382f73d82f0bf532702af8f4104733ac7843fedce50
pdf-font-stream PDF embedded font (sfnt) at offset 0xE72B 5136 bytes
font_01_sfnt_off0000f896.bin
a0ca22773b2304f4b2aa72ce45ded03fb06959f9ca4a4925bce1bb0ec91fba11
pdf-font-stream PDF embedded font (sfnt) at offset 0xF896 10016 bytes
font_02_sfnt_off00011ad0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD0 4324 bytes