Malicious PDF — malware analysis report

Static analysis result for SHA-256 db29a2abcfbc5081…

MALICIOUS

PDF

79.9 KB Created: 2021-09-19 05:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a947e196ad6a7b345858fb50307bf50a SHA-1: 1fcc7607cbb71ed065a07ad2fec0602f0550b136 SHA-256: db29a2abcfbc508102b619a8b1d8692edacc63063e59f04a0efb2fad026720b5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating an attempt to execute malicious code. It also features a link farm with numerous external URLs, many pointing to suspicious domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://elencostruzioni.it/userfiles/files/30706150418.pdf In PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/58083651798.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/mukal.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/xikumexifa.pdfIn PDF document text
    • https://springkasteelhuren.be/userfiles/file/famoxewakifaxidegerebol.pdfIn PDF document text
    • http://an-professional.ru/img/files/file/84073546358.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/80662811757.pdfIn PDF document text
    • http://1careglobal.com/upload/files/lutukij.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/kusezokipogemafelisuva.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/17787080495.pdfIn PDF document text
    • http://vertex-decor.com/userfiles/file/22386279505.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/18380453201.pdfIn PDF document text
    • https://ms2gacor.com/contents/files/tawoxeranudipeji.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/7170903934.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613d05a02259b---38131230632.pdfIn PDF document text
    • https://panoramabyty.cz/content/jivan.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/tiribudevijodusab.pdfIn PDF document text
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/26799413551.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/40312520010.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/27840466284.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad73adf32e---89987712379.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/23021550742.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=dot+net+framework+4.5PDF 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_off0000d3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBC 10528 bytes
SHA-256: c07f6bdb6fd16bc6da1290b236d4b2b999d4652388463c36a905847e4ea441cc
font_02_sfnt_off000103db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DB 18144 bytes
SHA-256: ae34ce21fa93a75a6bf6b20c3b4f934ad683f781c9081ab31e4bc3bb85ad9c40

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