Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a23d46a7938e5b…

MALICIOUS

PDF

88.5 KB Created: 2021-09-16 17:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3f7a58cc2deed621c3adde583407cce1 SHA-1: 3c9539b3e13c5be6ce62b4bf67ae1df1a2ed1962 SHA-256: 60a23d46a7938e5b76a8a064caf045139437cd7c19867e8cb14c5886d4d13f67
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many of which point to disposable domains, indicating a link farm designed to distribute malicious content or phish users. The presence of numerous PDF_URI heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://queure.ru/uplcv?utm_term=game+pepsiman+for+android PDF link annotation
    • http://theemasternetworker.com/ckfinder/userfiles/files/62438349460.pdfIn PDF document text
    • http://djpress.pl/Image/files/75717619392.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/viwekidage.pdfIn PDF document text
    • http://martonelektro.hu/files/file/27952446603.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec94fc39aa---8422344679.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/92121529921.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/70992182514.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/13948037158.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/31419113593.pdfIn PDF document text
    • https://abriganature.centralcms.cloud/galeria/files/fetolakubaladetugupolog.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/d30c1706446565b683431b57b4240867/36960925445.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/474042830.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/88645034089.pdfIn PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/24679257028.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/xufopajagadeluwetuwapake.pdfIn PDF document text
    • http://igs.compcierge-asia.com/ckfinder/userfiles/files/gidekaxilagife.pdfIn PDF document text
    • http://metabolit.ru/files/file/83496573244.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/migogibamanobajekezobufaj.pdfIn PDF document text
    • http://encino.kopanramen.com/uploads/files/20352369396.pdfIn PDF document text
    • http://canyonmeadows.org/userimages/difagiba.pdfIn PDF document text
    • http://hoachattn.com/image/files/94906537945.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/49573431605.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/rexigepafixamuvebuluzarow.pdfIn PDF document text
    • http://ctcinsulator.com/uploads/file/fenexavafefetigit.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/646747590.pdfIn PDF document text
    • 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_off0000f81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81A 10556 bytes
SHA-256: 2319487c90a02b3512ff511efe8453cbcb9c389f1af8813fb92fcaf579cdbc65
font_01_sfnt_off00011015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11015 16904 bytes
SHA-256: 64f837f1eac8a845f343764c44009beb18beab2e429a78f1d5d4fd5f0a352265
font_02_sfnt_off00013bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1