Malicious PDF — malware analysis report

Static analysis result for SHA-256 438e14c20414f007…

MALICIOUS

PDF

72.9 KB Created: 2021-03-01 20:16:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a89f3a364ab735a59c534d99e1715bb5 SHA-1: b06266aa98b425700ff2d6bfe11c276700a1c966 SHA-256: 438e14c20414f007f869b5e6daceeeefca22ff0cc8a112c53b124e3691892dd5
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 identified as a phishing trojan. It contains embedded URLs that likely lead to the download of a secondary payload, disguised as a fitness manual. The presence of external URIs and the ML classification strongly suggest a phishing or malware distribution attempt.

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://ponafet.ru/aws?utm_term=confidence+fitness+treadmill+manual+pdf
    • https://cdn.sqhk.co/pobefozo/9hatSJf/32778924144.pdf
    • http://kurixuj.sportsontheweb.net/93044984843.pdf
    • https://cdn.sqhk.co/janimivaxo/ahcn2FB/dollar_boutique_party_discount_store.pdf
    • http://kamikofonem.mygamesonline.org/how_to_install_adobe_flash_player_in_chrome_android.pdf
    • https://cdn.sqhk.co/jivazufevi/eihghJ6/mutaromozugegapivo.pdf
    • https://cdn.sqhk.co/kogoruzojif/ehfUXig/45388579353.pdf
    • https://static.s123-cdn-static.com/uploads/4427795/normal_5ff001d13e169.pdf
    • https://cdn-cms.f-static.net/uploads/4416332/normal_6025a48bae966.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/domegagowevag/what_is_the_strongest_loop_knot_for_fishing.pdf
    • https://s3.amazonaws.com/vaxebisapesi/guidestones_georgia_map.pdf
    • https://s3.amazonaws.com/piradi/how_many_calories_are_in_a_dunkin_donuts_hot_chocolate.pdf
    • https://s3.amazonaws.com/kufazete/61330120986.pdf
    • https://s3.amazonaws.com/rixevozajixezos/96024827222.pdf
    • http://bitujiduruv.myartsonline.com/metro_2033_book_audio_english.pdf
    • https://s3.amazonaws.com/muwemivumazulax/zexekodudaroz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de84.bin
e203aee7d94f944c3df8241ecf4da004438dba8ba3b76d68735e3b628dd5f4a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE84 5208 bytes
font_01_sfnt_off0000f022.bin
2ac6c48a8b23777d1163c8f8d73fc93acb6797c3e3b95b25a66429acb2d04b51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF022 11372 bytes

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