Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7e75a385b4af2a…

MALICIOUS

PDF

79.5 KB Created: 2021-03-13 21:02:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 453c3f2a3baebd13b3d694c65c31a098 SHA-1: 7758b4764acc93e7c4502fc152ab103fed7f9085 SHA-256: ac7e75a385b4af2a81587abe22ba3faba7f98d1c744163beba1206008dffb111
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or trojan distribution attempt. The document contains an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or redirect to a phishing site. The presence of embedded URLs and the overall detection by security tools strongly suggest a phishing attack vector.

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://pelibifir.ru/strik?utm_term=personal+development+plan+template+for+work
    • http://tipofeliluget.medianewsonline.com/how_to_make_money_teaching_languages_online.pdf
    • http://tukakesafaj.iblogger.org/bourne_identity_full_movie_480p.pdf
    • https://cdn-cms.f-static.net/uploads/4445129/normal_60314e2ccb8ed.pdf
    • http://lavkavkusa.store/voltaire_candide_ou_loptimisme750ix.pdf
    • https://static.s123-cdn-static.com/uploads/4459640/normal_5fdf6529e81e8.pdf
    • http://therarbooks.com/fall_leaves_report_michigangjmk4.pdf
    • https://static.s123-cdn-static.com/uploads/4368996/normal_5ffb8726363e3.pdf
    • https://cdn-cms.f-static.net/uploads/4448341/normal_6020c8aabb577.pdf
    • http://helplnstagram-confirm.com/candle_ear_wax_treatment_singaporeodmqj.pdf
    • https://cdn-cms.f-static.net/uploads/4499979/normal_602af7836fdf4.pdf
    • https://cdn-cms.f-static.net/uploads/4406223/normal_6022eacb9409f.pdf
    • http://sakulog.sportsontheweb.net/schlage_fe595_ply_626_ela_plymouth_keypad_entry_with_flex-lock.pdf
    • http://cashbackk.site/9008487094u21wq.pdf
    • https://cdn-cms.f-static.net/uploads/4420031/normal_6025f6ff3db87.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9b0545a3-f148-48ed-ad79-7ad1844f5611/71304061391.pdf
    • http://mevexunimapo.epizy.com/building_construction_gtu_book.pdf
    • http://nogogesusuwebob.epizy.com/69582264994.pdf
    • https://uploads.strikinglycdn.com/files/7400be88-314a-4d39-aa58-0f2065463fe4/chicco_keyfit_caddy_stroller_frame_buy_buy_baby.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_off0000f9ea.bin
ba1a87288805cb5e66e2cb369f229ecdffd562646de8d8316f519257671832a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EA 5404 bytes
font_01_sfnt_off00010c4f.bin
3355d89a8b3c6d6bffa16cab5c9008697662bad20d96b119c2e6ae5a89f38103
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4F 10704 bytes