Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf196d78c59a891c…

MALICIOUS

PDF

72.9 KB Created: 2021-05-01 19:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 43f4dd00fd4358ba8c5ce8862a53336c SHA-1: 4fd08e5d70e2eb51182f98d4c52ee3deb3a1dd44 SHA-256: bf196d78c59a891c7e07de39b4e1b029bc5b74b06e44e85bf4d62875ff8c8f77
96 Risk Score

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 flagged as a phishing trojan. It contains an embedded URL that redirects to a suspicious domain, likely intended to host a phishing page or download further malware. The document body, though heavily obfuscated, appears to contain a lure related to a search query.

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://midufefew.ru/strik?utm_term=burger+king+near+me+phone+number PDF link annotation
    • https://cdn.sqhk.co/nexapebevux/hfLrxPh/50809430795.pdfIn PDF document text
    • https://cdn.sqhk.co/nimabugokofa/dDic9wn/83756335620.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/hLPsggB/zituleguxufiziwuzaled.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/jegdoif/mojuro.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/phjKjgd/ecruteak_city_gym_puzzle.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/QhjO0hj/caged_chord_chart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500432/normal_604120302189e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496582/normal_60199740a14d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477139/normal_6051503d91155.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/rgi5jb9/vikings_wallpaper_for_android_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/rufomezin/djdjiP3/wikipedia_random_facts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393752/normal_5fc5c2d67f5f5.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/vukusa/32129148138.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/peugeot_103_sport_prix_maroc.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/how_old_was_the_harry_potter_cast_in_2001.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/putuziselutuxijeve.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/pinuvotix.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/rumabimad.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/stanley_25-amp_battery_charger_75-amp_starter__alternator_check.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/22069762545.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/zenamakokomuwelojop.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_off0000def2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF2 5276 bytes
SHA-256: a79567f5447183b6d1c3ea9054f4c6ceeb977614f91a195189d1d18469502db2
font_01_sfnt_off0000f0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B9 10892 bytes
SHA-256: a3e6758e520b12f0b377366282a825e0f564169c25f8d81e49f421711c506735

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