Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5494be378dc3fd6…

MALICIOUS

PDF

87.4 KB Created: 2021-03-13 16:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25b7416623987d7187b726ed05beb535 SHA-1: 9907df7747d0591b2647f6a3068113a963b92053 SHA-256: f5494be378dc3fd60ce8d3659738020d343bae20e7e5a10f7c6e46ceb1190d7b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate it is a phishing or malicious PDF, and the ML classifier strongly flags it as malicious. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into downloading a payload, likely related to the search query presented in the document body.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://jacksth.ru/wix?keyword=apk+plants+vs+zombies+2+full+espa%25C3%25B1ol
    • https://cdn-cms.f-static.net/uploads/4499021/normal_602cda5026d85.pdf
    • https://static.s123-cdn-static.com/uploads/4458849/normal_5fc5f44a3e7bb.pdf
    • https://static.s123-cdn-static.com/uploads/4480893/normal_5fcbac3d480ea.pdf
    • http://vizojuzoninunoz.scienceontheweb.net/jalixiselutibiva.pdf
    • https://cdn-cms.f-static.net/uploads/4454281/normal_6027f3ce353db.pdf
    • http://pogawubujogeje.mypressonline.com/best_fighting_anime_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4466367/normal_60467b2f9b6ef.pdf
    • http://sipipewawezizuf.getenjoyment.net/the_secret_rhonda_byrne_movie_online.pdf
    • http://tapozifokun.mywebcommunity.org/wosusamavovaji.pdf
    • https://cdn-cms.f-static.net/uploads/4453344/normal_6011796fd8738.pdf
    • https://cdn-cms.f-static.net/uploads/4493245/normal_60147367aa0fc.pdf
    • https://cdn-cms.f-static.net/uploads/4445864/normal_6019d3ce6bc48.pdf
    • https://cdn-cms.f-static.net/uploads/4462056/normal_5fd11626ec208.pdf
    • http://fumizudo.sportsontheweb.net/40319496591.pdf
    • https://static.s123-cdn-static.com/uploads/4416810/normal_5fc619955d680.pdf
    • http://mutujejeturuduf.medianewsonline.com/77270632080.pdf
    • http://zakewabo.scienceontheweb.net/laundry_symbols_chart.pdf
    • https://static.s123-cdn-static.com/uploads/4384642/normal_5fde4230aa2ae.pdf
    • https://cdn-cms.f-static.net/uploads/4409420/normal_603335f3c8c22.pdf
    • https://static.s123-cdn-static.com/uploads/4367950/normal_5fdea1cf410f7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vezumobigodub/2442950754.pdf
    • https://s3.amazonaws.com/woxewiwupir/bapivumiri.pdf
    • https://s3.amazonaws.com/kiwopusafize/41852441447.pdf
    • http://pimimozoji.myartsonline.com/kufuwetarul.pdf
    • https://s3.amazonaws.com/fojaxexino/business_budget_planner_worksheet_free.pdf
    • https://s3.amazonaws.com/jeponowon/xekepupasideralizi.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbf8.bin
4d0ef6776077eccda0607222f52d468daa6141c4292a6864982f91e0b2df12cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF8 5600 bytes
font_01_sfnt_off00010ec6.bin
5932c883ba6ec1216a93f4c7a0de299e67eff0db33a2165e54742901f2003ae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC6 12444 bytes
font_02_sfnt_off000137d0.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137D0 16204 bytes

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