Malicious PDF — malware analysis report

Static analysis result for SHA-256 53680256c04205e2…

MALICIOUS

PDF

78.4 KB Created: 2021-05-17 16:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c50797ef11a82e80147cd31823af95c6 SHA-1: db8f0a9a7caa8e79053520c7fbf934f53831a1ba SHA-256: 53680256c04205e2f49eff1ee23542b7dc2883682b0837a97b1c86802351a0bb
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=matlab+online+free+course PDF link annotation
    • https://cdn.sqhk.co/gofelaxes/hhifiLm/13070370509.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/idAgjjb/wusoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415055/normal_5fd17fd5491dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_60136c4da0912.pdfIn PDF document text
    • https://cdn.sqhk.co/jopogoxom/giijdhc/vubepesepemik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415756/normal_6020a8da0b824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_604d7536d2acf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371808/normal_600066a627d55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389816/normal_5fe0cc569eb6d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fedure/fringe_benefit_tax_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/vepuxatewefivejezezami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20fd3082-2773-490a-9a5f-0eb9d0f78cfe/why_is_my_cooker_hood_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e11fa9ab-e19f-49c3-9c17-1e5edce7d592/suguvezet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f90b460-00e6-4ba9-8d6c-6f084cae1d22/revista_caras_mexico_vicente_fernandez.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/falsifying_police_report_charge.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/zazafejeboguxi.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/zigeximelatibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca037d7-caf2-4ff4-b2a2-90acdc1d9abb/58764208844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66eaa25f-7641-4c16-a6a5-7e8e45ca5ed3/evinrude_e-tec_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/70014519981.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/72259503034.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_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 5020 bytes
SHA-256: 14f771103fb6c677f1773b2838f897cc45393f471b1e4d2ef3cae4afb08cca82
font_01_sfnt_off000106b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B7 10608 bytes
SHA-256: 369b01c692be12dc1ffe65db2f419ec6b4074005531b236bfd2feccc2edb6481

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