Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a2a32d59a4ea4a…

MALICIOUS

PDF

72.7 KB Created: 2020-12-19 11:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c1e7493d1cf55e64bd7ee9fa1a9be000 SHA-1: d5b79db9acad2651243edf8563e18acd5fd457e4 SHA-256: f5a2a32d59a4ea4af61e2badc9cecdaf235d9e1643d4fd54f2e8193080386ac3
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'trafffe.ru', which is a suspicious domain. The PDF structure itself appears to be malformed with duplicate objects, suggesting intentional obfuscation.

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://trafffe.ru/aws?utm_term=glyph+crafting+guide+eso PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481520/normal_5fb2a8990dfda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420903/normal_5fd261a639af5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/124c5c5b-f47a-4c31-84e0-c9bdb410b312/72309679461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e746204e-0657-4227-94a2-ea78446a64bd/nufizajowefo.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/manually_bootcamp_windows_support_software.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/78594377702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880546cd-4c40-47a3-964d-697fc611043b/hubsan_x4_h501s_advanced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d3c6a0-fde0-4465-9a34-b646ba191d53/kagajop.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/vector_design_brushes_photoshop_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc39e3c5e8e827d429ee1bf/t/5fc42145eaf37e3b641e87e3/1606689093343/15721590312.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d6b6bf71053ccb290274/t/5fc52ffacb3e0f5771f75d34/1606758396011/79598402385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/409a624a-4e9f-4f00-af70-71411eb11ca1/best_buy_mayfair_mall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a01d3d-edd9-4e31-a7e2-b1c21d6fac72/wow_classic_shaman_leveling.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/agradecimientos_de_tesis_ejemplos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB8 5432 bytes
SHA-256: bbec7e7717c923dc27fee6f2d714f58a6847a85b5e38b1e657739fc2b3456cde
font_01_sfnt_off0000e136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE136 11000 bytes
SHA-256: 49de3f5ea925a10ad99ea6e0a806b380211925a684cdc62d3a229ce2d795115a
font_02_sfnt_off00010695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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