Malicious PDF — malware analysis report

Static analysis result for SHA-256 875d2a1d69fcc1ed…

MALICIOUS

PDF

78.2 KB Created: 2021-09-19 16:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 68df1d83f5876f059af31b45ce30a1b6 SHA-1: 685cda526f1443f6775be7ae0084c9660156c332 SHA-256: 875d2a1d69fcc1ed182124c485869d103d64a8b45be06c07783aad75e9a309de
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://allytemp.ru/uplcv?utm_term=mortal+kombat+11+full+apk PDF link annotation
    • https://martas.vodrsport.cz/uploads/files/zojezuxovifi.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/92482580412.pdfIn PDF document text
    • http://youil.org/userData/board/file/31061499568.pdfIn PDF document text
    • http://bluebossa.pl/files/file/20314273773.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/pabagolugukulijefexemuxa.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/wapekujomutexevedirubar.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/pejewareguzegemiwerukok.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/48347598192.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/61983018058.pdfIn PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/sofofuzux.pdfIn PDF document text
    • http://taemyung.com/data/upload/file/sibubetigemokoliledi.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/girorozukitetazivegofuwo.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/wirukamolelogak.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/13733057874.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/29e54af21e0d120b7507a0fcaca7d6ad/juzuzonesavo.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/69179530741.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/guxozubonowuwir.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/koliva.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/9395094397.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/8852686929.pdfIn PDF document text
    • https://tch.lu/files/files/84232532011.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_off0000caf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF6 18244 bytes
SHA-256: 74b43a5d3b785d7e2c7de7b1bdb7c3d005dec591568e0458e768263bc205172d
font_01_sfnt_off0000fa4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11264 10400 bytes
SHA-256: 6924ebf93aedf04a2544dee592df8743642d1b66c43794ef6bc874dfe68d28e0

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