Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bf58a8079f200e9…

MALICIOUS

PDF

88.7 KB Created: 2021-03-18 03:29:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34de47f05566fcd0aa506c9e6713bf01 SHA-1: 35ba9f03fed9c77c253ab7a955cd76f0655400cc SHA-256: 5bf58a8079f200e92afa7a3b0d5c390bfff5741bc7d565a50d5f36885c9898da
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains an embedded URI pointing to 'seumenha.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a game keyword, suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/wix?keyword=worlds+hardest+game+3+unblocked
    • https://cdn.sqhk.co/doxowite/AMjjahc/why_aren_t_my_disney_plus_movies_downloading.pdf
    • https://cdn-cms.f-static.net/uploads/4378831/normal_603821b265951.pdf
    • http://groshyk.site/boxokavisitorofejarazittc1np.pdf
    • https://cdn.sqhk.co/xovinexesun/jj1r5gj/is_coolrom_er_safe.pdf
    • https://static.s123-cdn-static.com/uploads/4410214/normal_6006be3095c50.pdf
    • https://cdn-cms.f-static.net/uploads/4408335/normal_602f6fa98916d.pdf
    • http://erogancolumbia.site/the_girl_with_the_dragon_tattoo_2011_movie_cast28x59.pdf
    • https://cdn-cms.f-static.net/uploads/4476002/normal_6023cc695ef33.pdf
    • https://cdn.sqhk.co/fenazijeguk/ehg2hjg/mejiwinaror.pdf
    • https://cdn-cms.f-static.net/uploads/4423430/normal_5fd9ba58c3b8b.pdf
    • http://sqrab.top/62002642082quo3d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/16dd1f61-7d78-44d9-aca4-690c41eaa800/why_is_my_ac_heater_not_working.pdf
    • https://uploads.strikinglycdn.com/files/e1ce2390-4000-4433-b733-9bae05761fe1/let_us_cross_over_to_the_other_side_sermon.pdf
    • https://s3.amazonaws.com/xafaxotaful/xazodojudoveg.pdf
    • https://s3.amazonaws.com/regovadeje/delomikiw.pdf
    • https://uploads.strikinglycdn.com/files/553c4dd4-fbbf-41e1-9bed-534bf11fa609/jofidatiloweri.pdf
    • https://s3.amazonaws.com/tuxexi/rational_functions_quiz.pdf
    • https://s3.amazonaws.com/zumezeviwakiz/sapeminowadikujudenajezit.pdf
    • https://s3.amazonaws.com/gozilum/58006078340.pdf
    • https://uploads.strikinglycdn.com/files/ab679aea-eaf7-43fd-ab31-f058cef7e26d/define_news_literacy.pdf
    • https://s3.amazonaws.com/poguvelefa/4919521183.pdf
    • https://uploads.strikinglycdn.com/files/2edb1061-39e7-4c7c-ab48-7dd9aa4410d7/5827179626.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b58.bin
52a4aeb7f47c740077abb1c387a17f8deb0698ef8eefcf7eae993da6db487677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B58 5568 bytes
font_01_sfnt_off00011e33.bin
e1754eb8932bb60fcd02da4a4b218a7526228b503f1b655d28713404030e7cfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E33 11592 bytes
font_02_sfnt_off00014546.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14546 4324 bytes

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