Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ae639ebe5171e6…

MALICIOUS

PDF

79.9 KB Created: 2021-09-11 17:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 19ca213cc91ef3807bac270df3106712 SHA-1: 290e3074767b32c4b0040f6b7debec8b73245454 SHA-256: 29ae639ebe5171e641a0076923cc65108718289ab93b55faea7cb6d5867f228a
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external URIs, including one pointing to a raw IP address, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous links suggest it's designed to lead users to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/34318398357.pdf In PDF document text
    • http://hacsbathtarntaran.org/~/userfiles/file/furizupukaw.pdfIn PDF document text
    • https://asiapharma.la/files/files/fetikigevakuzujeb.pdfIn PDF document text
    • http://topflexsports.com/uploads/70751007524.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23590039016.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/lorekabenubiveputoritul.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/11498759772.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/34843135604.pdfIn PDF document text
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/dinegavawizelopotekitar.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/18933024981.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/61109281882.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/sofofuxulozezakum.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/72714059494.pdfIn PDF document text
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/tovulinujaxerabubij.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/91826890051.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/87381927117.pdfIn PDF document text
    • http://thietbibepnhahang.net/media/files/nokag.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb4dd633f8---suzebazagudetejipuxokoso.pdfPDF link annotation
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/nofaberepup.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/buwidifosevatiwoz.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ffcb6660c---37520879248.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/vosalelowutederuxexuvuba.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16137fdb034872---70145729120.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/sanudurerojavigedijigaren.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+get+your+tablet+out+of+safe+modePDF 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_off0000d42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42D 17488 bytes
SHA-256: 215809f4f8ef4cf4d3cc79d2275c6a78f275b5475e6aa0c89d24163d9ec9df29
font_01_sfnt_off00010104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10104 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001191b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191B 10932 bytes
SHA-256: 68e171d20999ba5381898d09b13c7242c72024bd4a16e945ae65e37f0d4d430f