Malicious PDF — malware analysis report

Static analysis result for SHA-256 37b9ff6e5298a3e7…

MALICIOUS

PDF

65.1 KB Created: 2020-12-01 02:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 2ff37c66dfa819e76e3bd7ddad613328 SHA-1: 11383838ee956a74d520471dddc8933678a21d95 SHA-256: 37b9ff6e5298a3e7ca2c56dacc1712b1dfd1c6a66aa8dda6d2b7f7b6cb943391
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to search terms, suggesting a social engineering lure.

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?utm_term=house+of+leaves+pdf+reddit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409123/normal_5f9f119475029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480588/normal_5fa61c72c2057.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/piwanisaj/kelloggs_memphis_tn_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/gartner_magic_quadrant_network_access_control_2016.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d7d9c6229360ecc61b7b/t/5fc57d7df3de5e49b5203237/1606778237844/fragments_and_run_on_sentences_quiz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00a5311f6a4198480ec6e/t/5fc1133be6d49a06bbb7f8bd/1606488891432/multiplication_drills_2_5_10.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/gipizepezajokas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b7932e34347c70431387/t/5fc425a0bc819f1cf45b6ab2/1606690209677/90155760517.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb1ae9fc3622d51d09b9/t/5fc0dd455147b1480453b47a/1606475077372/samsung_moisture_sensor_he_dryer.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/terrorismo_que_es.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee8998f0-d97f-4289-bd68-49be02d8a5af/44848373864.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_off0000c5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AF 5056 bytes
SHA-256: 01493d23695907b7e26c395ce274e121898980efc93c34a6703bce2cfbe8f19a
font_01_sfnt_off0000d6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F6 9580 bytes
SHA-256: 64319b360fe2353005737bdf0cf9bd5935063ab42bf5550958bf50cf2d80524c

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