Malicious PDF — malware analysis report

Static analysis result for SHA-256 beff2df2f5aab899…

MALICIOUS

PDF

79.3 KB Created: 2020-11-11 11:02:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 35a67406dc09549eeace04e1ba8769e9 SHA-1: c1f40c69a07053cf23e490e4fb351c815ca806a9 SHA-256: beff2df2f5aab899a5c147215e8487fe6734913d4f3570985ccfc7fc98951ef8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'trafffi.ru', which is a strong indicator of malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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://trafffi.ru/123?keyword=step+2+neat+and+tidy+cottage+ii PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5f8eb104028a8.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/24922b38-4fc5-44ef-b089-f9d61d9a542a/82532370333.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/jisufatovevexorusal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5418a502-24ba-4e3b-bc2f-d3e854a5014e/65553059311.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/unblocked_games_99_madalin_car_multiplayer.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/benchmarking_methods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de3275d-ae21-4924-af8e-014e73a7180e/indigenous_knowledge_systems_and_development.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/75239245916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e01b25-ce7f-4ec3-87db-76c35999c90b/53825834233.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/tejinurowawaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f688a96-ff09-4f66-9c01-627d155ea48a/dugavumatuvifaraja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b9cacc9-cb2a-43b3-bc0b-4b710980daef/juwirewitogikowitanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a2bd7f0-01b1-431d-8966-d93c76395467/2701583046.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/volutekupifu.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/difetote.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_off0000f9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 5272 bytes
SHA-256: 73977a16cd482542b6c21310896174133baf4259c637159b171018163caf2e2f
font_01_sfnt_off00010bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB8 11000 bytes
SHA-256: 44772f87dbe43a321a014eac0e763db2975015804956e7fb91d064857a3c083f

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