Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d267fc035f6979a…

MALICIOUS

PDF

76.0 KB Created: 2021-01-02 22:10:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0b50db7d560ba07cc45dee49f560699d SHA-1: e09e600de00b90ed8616400076fdf51736ea1e42 SHA-256: 8d267fc035f6979af918e07054d0a95543ab9ae80dbb898fd457439320429820
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, which identified it as a phishing trojan. It contains an embedded URL pointing to 'trafffi.ru', likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, contains references to 'packet tracer' and 'wkhtmltopdf', suggesting a lure related to network simulation tools.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=6.4+3.4+packet+tracer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494663/normal_5fe2329c953d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414502/normal_5f99eccc991e9.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/94f17c75-bf87-4553-8a86-75bd0322205e/mobile_payment_companies_in_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/59306921543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5eaf1c-ab71-404f-87a7-2b9e55bf9575/pink_nfl_collection_2015_release_dates.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/dog_island_florida_weather.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/4159128166.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/mabiv.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/93225942361.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/android_programming_the_big_nerd_ranch_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/the_turning_2020_mkv.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/74362814946.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/best_ticket_websites_for_events.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/mowezuvizilokelizol.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_off0000e067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE067 4648 bytes
SHA-256: 3c09fe0b7c049715201cb998565652ea491c58f0394fdbd0acdc44adc0d13fdb
font_01_sfnt_off0000f03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03E 10788 bytes
SHA-256: af4f8ce9445e5eb8bd956955f95468068b99853142b556460c89249786dcb248
font_02_sfnt_off00011534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11534 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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