Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff31238ec6e880c4…

MALICIOUS

PDF

91.4 KB Created: 2020-11-20 23:46:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 78d0f76c7f30abf309c47a99739f16a2 SHA-1: 68c8f5f35fe2d8f33d2d8be23e934a6cb226a71f SHA-256: ff31238ec6e880c488b04f5f22233c4b1c17103ca7ca4cac4b0d89b9edc6009a
136 Risk Score

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://traffset.ru/aws?utm_term=eu+gmp+guide+annex+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5fa84fac9f465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f875c8dce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5f885ade36aec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_5fafef3b6c400.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff3bd432-c993-4cb6-926b-e8c9dab11a5f/full_metal_jacket_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4429194f-9f62-459c-87b1-5b66da5e0e7b/young_justice_artemis_dies.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/hinduism_vs_buddhism_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b0d00a-b6c0-4edc-bbbf-95788131e64d/xuluxulitusufewebate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/143564aa-24f4-46e4-91f8-1e3b0e090c27/88562651316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c3bdaa-fe4c-43cb-b8c7-fd888dea80f0/knots_prayer_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/133c308b-75e9-4469-8366-b2fa6ce43d67/onkyo_tx_2500_review.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_off00012b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B48 5048 bytes
SHA-256: f5b6399f4c69eba0c30428ae1de1781d4c46fb6414b2edcc7fb4fc574339adcb
font_01_sfnt_off00013c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C71 10852 bytes
SHA-256: b14ca7a23fcd55efa709d290e988f52739204f14ffa15e7b3d20901b48b90201