Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9934265e96ff6c2…

MALICIOUS

PDF

77.7 KB Created: 2021-03-31 10:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d22692cb4329a246873f0de42a08ec5a SHA-1: 249ac0b30288b0b3ee3f3eab193b0840fcd05772 SHA-256: f9934265e96ff6c21a81a42e2a1a4a26298113412c35f3119e00c9eb9e44a96b
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, specifically pointing to 'https://mezovuduw.ru/strik'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest an attempt to redirect the user to a malicious site for further compromise.

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://mezovuduw.ru/strik?utm_term=what+percentage+of+cacao+in+dark+chocolate
    • https://cdn-cms.f-static.net/uploads/4484364/normal_60254b76d8e8b.pdf
    • http://rutevelafi.iblogger.org/expressionism_and_impressionism_artists.pdf
    • http://rujokevawevi.22web.org/what_was_the_95_theses_all_about.pdf
    • https://cdn-cms.f-static.net/uploads/4445320/normal_604bc3a1e01ee.pdf
    • http://tufataf.22web.org/42450501448.pdf
    • https://cdn-cms.f-static.net/uploads/4455660/normal_5fd631ede372a.pdf
    • http://ropakega.22web.org/naberavozepitotoruzuxolu.pdf
    • https://static.s123-cdn-static.com/uploads/4421350/normal_5ffed44c5246a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a2185e3b-104a-4b2a-85d6-9413ae46f420/pamajugilixigigeweza.pdf
    • https://uploads.strikinglycdn.com/files/fef428b7-dae6-4810-840a-4d74f49b87b3/kofatiwasakoziros.pdf
    • https://uploads.strikinglycdn.com/files/2b17195b-f095-4695-a6f5-284a9b8cfa88/job_stress_scale_questionnaire.pdf
    • http://sibubixusa.epizy.com/13715907027.pdf
    • http://befugoj.epizy.com/why_wont_my_galaxy_s8_plus_turn_on.pdf
    • https://uploads.strikinglycdn.com/files/cc5d21b8-50e9-470a-830f-261d2308498d/76149426272.pdf
    • http://bubezowi.epizy.com/kudelagapamar.pdf
    • http://govatojajij.epizy.com/everfi_module_2_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/f66f2148-946d-4dd4-8a27-7974d02321aa/how_to_use_self_hypnosis_audio.pdf
    • http://muzasedek.epizy.com/95588714874.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f159.bin
23fa023e0aae9f7955154aa6d7432260fe9bca3b81725da77e3112ad48376bf3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF159 5316 bytes
font_01_sfnt_off0001037a.bin
9b97068ee0378b958cd5f9c85e5490a22e90fcaa6929b323af2da2aabdebef8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1037A 11192 bytes