Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01d9c2638f26c9d…

MALICIOUS

PDF

78.1 KB Created: 2021-03-24 08:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a5db3670f979be27adef70d66a4abc13 SHA-1: 102b796057713b52bfba8770d31a7676c5231305 SHA-256: f01d9c2638f26c9dbfac3d9294752f3bf6a437a65e39b51cc3f900d27aa39b57
136 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into believing there are new or changed payment instructions, a common tactic in business email compromise attacks. The embedded URL points to a domain that is likely part of this phishing scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://seumenha.ru/award?keyword=liquidity+risk+management+in+banks+pdf PDF link annotation
    • https://cdn.sqhk.co/remimidotomi/icHP78V/norixutoso.pdfIn PDF document text
    • https://cdn.sqhk.co/devuzemalut/Wgf1JPV/earthbound_clothes_shop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481825/normal_600c676f4b03a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_600f110dcf174.pdfIn PDF document text
    • http://wanisusikufa.iblogger.org/bpsc_65th_answer_key_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448137/normal_5ffea5e3b2733.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sakigekoxigukil.epizy.com/lufovudetepelusipatadu.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/miwupotenewepelubajem.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/gosixudebizejetedem.pdfIn PDF document text
    • http://jidodurej.epizy.com/cybrary_cissp_videos.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/91255997920.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/37607048921.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/corona_kerosene_heater_wick_22-dk.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/baofeng_black_uv-5r_v2_plus.pdfIn PDF document text
    • http://sumoxajavagal.rf.gd/watezotivanoli.pdfIn PDF document text
    • http://jikusawiv.rf.gd/training_deliverables_template.pdfIn PDF document text
    • http://lepamiruketujuf.epizy.com/sample_resignation_acceptance_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/civ_5_guided_missile_upkeep.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/black_panther_full_movie_toxicwap.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FA 5704 bytes
SHA-256: 19adcee7ffd780087488ca3bf084555b49c88b98643adb68f13f57341ea180e6
font_01_sfnt_off00010558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10558 11404 bytes
SHA-256: 4b51c442404db4856a2d41502477317570b36a6dbb036a1c95fa2f7b19f694ab

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