Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2880097d11deac0…

MALICIOUS

PDF

73.2 KB Created: 2021-01-12 00:10:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 87fa234367ec595b898c17b684e836d2 SHA-1: 23c12e7d55bebdcd36f16d3c7cd15fb551e28e10 SHA-256: c2880097d11deac0bb60e7631fa0f695c5ece0cf60827a02877690e3cdc272b5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick users into downloading a malicious payload or visiting a phishing 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/aws?utm_term=linus+and+lucy+sheet+music+free+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f87d18b31e31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453902/normal_5fd7a142edad7.pdfIn PDF document text
    • https://dujefeva.weebly.com/uploads/1/3/4/5/134589135/02a7477d.pdfIn PDF document text
    • https://kovovovugatu.weebly.com/uploads/1/3/4/5/134599685/pofulujupuf_bevup_bumazakezug.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/wChiaRF/encyclopedia_dramatica_offended_song.pdfIn PDF document text
    • https://cdn.sqhk.co/xilelawemu/iRRQjfA/world_war_two_propaganda_posters_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatapegil/RhfRhgR/how_to_write_a_simple_literature_review.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiminiv/gdrQdhi/andrew_james_retro_popcorn_maker_instructions.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://s3.amazonaws.com/minabiwa/53716714588.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/fipebujesuganugematikuj.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/alegatos_amparo_indirecto_formato.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/rusowodabotodorezagesu.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/best_3d_adventure_games_pc_free.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_off0000d157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD157 5208 bytes
SHA-256: d32ce077e9d7e337e82d1cb2d7b2c79fd9588d5f3970db2975f646bd2f73dd21
font_01_sfnt_off0000e2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DA 11724 bytes
SHA-256: 0e75f6f44a58cc9411000f3c79e43aa4115c7831e5dbd3f5a1c239a18c062941
font_02_sfnt_off000109f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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