Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8f9bb606d339ef…

MALICIOUS

PDF

70.3 KB Created: 2020-12-20 06:26:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 767e8ac3052b6a949dcc24f39ba5e293 SHA-1: 529d771b3b1ce0c201306c741497455597398282 SHA-256: cd8f9bb606d339efc3006f8bb772ea4a8d311608642d71335fcf838b45807e82
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains an embedded URI pointing to a suspicious domain, trafffe.ru, which is likely used to host malicious content or phishing pages. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=blackfathom+depths+entrance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459057/normal_5fc252179bdef.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/wajibile/79428307897.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/gail_india_limited_annual_report_2018-_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3a15f3-52a0-4e8c-b537-d71325b28d46/34429548207.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/finikefebiwotosonesab.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/stokely_memorial_library.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/statistical_analysis_in_research_methodology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b43904-d4b6-4428-a511-32dfb14349ae/81902394940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd4a400-0070-46ae-b855-e223812a62ec/vimolukumipetati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c731bf-9ac3-4246-a457-dfdbf0e0a1e4/car_clip_art_outline.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/asha_chilo_bhalobasha_chilo_dj_song.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_off0000d3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E3 5508 bytes
SHA-256: c48c47ce6c678311deac4ce2e74aa61521d81a765b879d27f8fcead89a7d5aae
font_01_sfnt_off0000e67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67F 11456 bytes
SHA-256: b868e597a2243ded2ced0e56bf737482f7e85b906ff867c9f2c9efc2f0236ccb

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