Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c287c2f4f7e8b1e…

MALICIOUS

PDF

73.3 KB Created: 2021-04-06 01:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca6c3e5eef55e83d5550762bd54ab6fb SHA-1: 805e1633263bd7aa05f92c8d13bf9a831cb3a6a1 SHA-256: 9c287c2f4f7e8b1e81a083ef032fe9070a4eea1fbf794a069fc5368f2d59ab3b
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of numerous external URLs, including one pointing to 'ponafet.ru/award', suggests a phishing or scam lure designed to trick users into downloading further malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious PDF designed for distribution.

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://ponafet.ru/award?keyword=lippincott+biochemistry+question+bank+pdf
    • http://xopaberowiwin.getenjoyment.net/33425970778.pdf
    • https://safupoxex.weebly.com/uploads/1/3/2/6/132683070/8271791.pdf
    • http://kafidovomiguvo.mywebcommunity.org/bram_stoker_dracula_book_ending.pdf
    • https://cdn.sqhk.co/pulizojiwim/xjjeCpE/68954787240.pdf
    • https://static.s123-cdn-static.com/uploads/4495838/normal_6007f10d56be4.pdf
    • https://cdn-cms.f-static.net/uploads/4372376/normal_603c08f38b4d5.pdf
    • https://cdn.sqhk.co/renapudovi/jhTgfJQ/windrunner_sisters_age.pdf
    • https://cdn.sqhk.co/jalotenabo/a6ygfFQ/lumosity_brain_training_mod_apk.pdf
    • https://kebetesoma.weebly.com/uploads/1/3/2/6/132695457/e6520582f3a.pdf
    • http://wiinorama.website/3607613043wi0oj.pdf
    • https://guwidavimup.weebly.com/uploads/1/3/4/8/134893931/zarunuw_dokag_rejezudosavew_renenavolozem.pdf
    • http://samettemiz.xyz/527456140740p1q7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mubaviz.epizy.com/93574964595.pdf
    • http://sawotopedexorod.epizy.com/center_button_in_form_bootstrap_4.pdf
    • http://bodirinukamole.onlinewebshop.net/amplitude_modulation_numericals.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_off0000de35.bin
6ff528235bd67568b90727e262e5ab3de74c82ff64c3ee56b5bdf8bcd9af1833		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE35 5736 bytes
font_01_sfnt_off0000f18e.bin
7930d0fbeac4c94fcfd9cfa81c81c956e9196bcb7f2989e7131cc609767d1428		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 11208 bytes

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