Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f142133483376d…

MALICIOUS

PDF

66.9 KB Created: 2020-12-18 12:39:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 50eb42ba6677221c461d78f79f6be690 SHA-1: 98c09675e847f34e158601bd213a842276f0adfb SHA-256: 33f142133483376d3576e36b5a9e7e87303fe1304a1e7fe8eb35312d5555a4c6
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, and heuristic analysis indicates a payment redirection lure. The embedded content, though obfuscated, suggests an attempt to trick the user into believing they need to update payment or banking information. No scripts were extracted, but the presence of a malicious URL and the lure pattern strongly indicate a phishing attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://gettraff.ru/wb?keyword=outlook%20%20address%20book%20schedule In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_5fab0897a2380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405440/normal_5f97514b2a905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_5fb8d2fc480c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444626/normal_5fd830a48baa6.pdfIn PDF document text
    • https://namatevugaveri.weebly.com/uploads/1/3/4/3/134350782/7423265.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/piradi/98596439071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84096a0-cc60-462d-b01a-ddc4cd6abaad/elena_undone_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/84745775202.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/8430902723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8446829f-4b7b-4ce1-ba9c-af68bdcb14f7/dovixilapizuguzubolebi.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/co_dau_8_tuoi_phan_5_tron_bo.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_off0000c8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D1 5256 bytes
SHA-256: a6c390f44844099e0d9b5540cdd7a4fe7caa80ae131b680d4351d4032eba8649
font_01_sfnt_off0000daa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA3 10692 bytes
SHA-256: 7559c8c073c7804c0193b5c8f00c35fa703d10bd337a42b54a7054bdff6f0db8

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