Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0774f61acddc4c…

MALICIOUS

PDF

78.8 KB Created: 2021-09-09 00:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 0283cb548fd14007c840e026d5bc4b5f SHA-1: 7640316b9e6d8bdd1193bfd5264342458cb41edc SHA-256: fe0774f61acddc4c622c5fe460552bce5d13d10892ca80b7c95137879da9639f
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple heuristics indicate malicious intent, including a ML classifier flagging it as malicious and ClamAV detecting it as a phishing trojan. The presence of a download button lure and instructions for a password-protected archive suggest a social engineering attack aimed at tricking the user into downloading a payload. The embedded JavaScript likely facilitates the download or execution of this payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://itps-group.com/uploadfiles/file/52207090376.pdf In PDF document text
    • http://pk.mo/userfiles/file/82858378112.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/57238404845.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/86066677234.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613908f156ffe---59816486488.pdfIn PDF document text
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/fixewikodireda.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/wugug.pdfIn PDF document text
    • http://kco.su/userfiles/file/67651039994.pdfIn PDF document text
    • http://pololanna.com/user_img/files/74734922778.pdfIn PDF document text
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/54854207266.pdfIn PDF document text
    • https://webmedcentralplus.com/userfiles/file/51850364332.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/nejogejugozuve.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/256b658b50cec01c12e850e356373e8f/niterapugarurodus.pdfIn PDF document text
    • http://aeusjtu.pretty-match.com/upload/files/30503795789.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/xabesu.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/65604493333.pdfIn PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/76104539097.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/33470088498.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/gupumarepavedadotonarejev.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/dutipakevojojaxezevezun.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/piwuwami.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/75040389156.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/71579316323.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/nadokazewatoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=gta+v+psp+romPDF 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_off0000d2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACA 17188 bytes
SHA-256: 8cab23a1943f8a55f55b337393e140435b25ffdd083e2ca4530b7771a2f08eaa
font_02_sfnt_off00011783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11783 10144 bytes
SHA-256: 13e6598acd69fd4b3288efeb4fac909f17f6c1b4abe01efb56f3c46c012a53e6

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