Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe74f1b76e3d4902…

MALICIOUS

PDF

82.4 KB Created: 2021-10-09 17:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c150d2cf5df4fbc57bb28a3ba2c02a41 SHA-1: 6834b4b18393f2763df8ff49bc2942cccb7e2475 SHA-256: fe74f1b76e3d4902ee9098907742f47081de6f4b05537ef3fef85c1c9a65f2b2
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for delivering malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to a link farm, as suggested by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic, which in turn hosts further malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://dvif.fr/userfiles/file/dopuxozo.pdf In PDF document text
    • https://tezerwatch.com/file/upload/files/09-07-20-50-21-76.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/30215724258.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/79118145759.pdfIn PDF document text
    • https://www.edm-medical.net/ckfinder/userfiles/files/suvirumamikimopijafurew.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/nimorojosezuwavorurul.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/92718598651.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/kedavuj.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/1ao3j71qjoaqa76c365udl4br7/98442024176.pdfIn PDF document text
    • https://alicantea.centralcms.cloud/galeria/files/50960751915.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/rozuk.pdfIn PDF document text
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/dokupizasuxegibakefasufim.pdfIn PDF document text
    • http://freestyler.cz/img/file/mekidogezamosofowedadutu.pdfIn PDF document text
    • https://haidangpc.com/contents/files/lujowilanekifis.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/mikerose.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/57822679532.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/27137274026.pdfIn PDF document text
    • http://mastervin.ru/files/file/lewogujetetetenaloj.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/63857169315.pdfIn PDF document text
    • https://datawire.gr/files/files/56846830229.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/95400855976.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/pelodejoradodakevor.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/51685594194.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/90653522368.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=raspberry+and+blueberry+compotePDF 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_off0000d78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78C 19252 bytes
SHA-256: 59654cff9a6c47ea22815c31140f5db72b6fb539c23a42b73eb630c01c7a7e16
font_01_sfnt_off00010aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C0 10984 bytes
SHA-256: c1343b16174af69934784c03e64f841206cc061fc7cc111218fe83e5308d1983

Open this report in the interactive analyzer, or submit your own file for analysis.