Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9f69b3d97d9211…

MALICIOUS

PDF

82.2 KB Created: 2021-09-12 10:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 11edc63fda3b50dcb57df7021921642e SHA-1: 842bf831418b75dbb9468bbd84a79fcd787c4003 SHA-256: 9f9f69b3d97d921180e512cf3080ac7389b71a31e97d1abf92183b493418b4b8
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm, indicating a malicious intent to redirect users to potentially harmful sites. The ML classifier and ClamAV detection strongly suggest malicious content, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=chamet+unlimited+coins+apk PDF link annotation
    • https://grouptm2.com/contents/files/42614838636.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/78126969917.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/dirijetewapemew.pdfIn PDF document text
    • http://fgosvo.ru/files/files/85426469948.pdfIn PDF document text
    • http://khachsanmyngoc.com/upload/files/36278762910.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfcfc88f16---xejijabekusabuditizenari.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/55498955577.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/59468776865.pdfIn PDF document text
    • http://hkwwta.org/userfiles/dokavowetupej.pdfIn PDF document text
    • http://baominhlabors.com/upload/files/25107925732.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/15478732074.pdfIn PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/51062601846.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/1007240976.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/32354078847.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/kavev.pdfIn PDF document text
    • http://umbabox.com/userfiles/file/padadowitoxifutopume.pdfIn PDF document text
    • http://insuralead.com/userfiles/file/besojunebisipe.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/mowiw.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/jotapisesulaxitabo.pdfIn PDF document text
    • https://valergences.fr/userfiles/file/39805311317.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/derumodakopidabonudix.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/piwomivel.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/44271641191.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/xexebozifopew.pdfIn PDF document text
    • http://traiteurluc.com/userfiles/file/kexokirusikivisev.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_off0000dcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBF 10904 bytes
SHA-256: 5b1e7ec3c78807080baa43b3ff01d33786ca1315ba1b5645e348112b0fe563b1
font_01_sfnt_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 17392 bytes
SHA-256: 1fd2722e3850e2427508a7482294873dbec11fea4429913665eea05f5004b88c
font_02_sfnt_off000122cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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