Malicious PDF — malware analysis report

Static analysis result for SHA-256 42ef1dc78a65f17b…

MALICIOUS

PDF

208.9 KB Created: 2021-09-12 23:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: 612b4dbfab881918ed141bc72618b528 SHA-1: 45a8fdda997da1040d0bbd5958cb166df68a44fc SHA-256: 42ef1dc78a65f17bc1d9ed39373ad599e227edd1bc35f672b0bb61c1ea402bba
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://shriramashramssschool.org/userfiles/file/rabedenexoke.pdf In PDF document text
    • http://pomelieagency.com/userfiles/files/90106398270.pdfIn PDF document text
    • http://phupmirpol.pl/userfiles/file/tenizulux.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/5366422579.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/fipomu.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/lifadaginukuxes.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210909_041958.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/lisewodab.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/24870859833.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161303c5e4709e---gemanolijes.pdfIn PDF document text
    • https://cancelaria.pl/galeria/file/ginirirujagotunebeluku.pdfIn PDF document text
    • http://flexa.cz/docs/file/fonovewaxogi.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/jimovezivifedu.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents/files/diziret.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/zavesigedowazuzaxunuv.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/5138795e9961f18170a608db56bfe35b/tinigijudojelonotonopagiv.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/jipafasodurum.pdfIn PDF document text
    • http://congluc.com/upload/files/26688705608.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210901115842.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/78922144523.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=thomas+calculus+in+si+units+14th+editionPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C669 22936 bytes
SHA-256: 81eebe600379a6e4483514c401311eb9a8f8892bd1b52e7eb15256bd2abcd900
font_01_sfnt_off000302de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302DE 10728 bytes
SHA-256: 0da0a757f596b63e4d3957486a526e5417ca0c7f0c78021c20e676ed2b9405e9
font_02_sfnt_off00031b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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