Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9774a0e14737c4…

MALICIOUS

PDF

80.7 KB Created: 2021-09-13 14:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ba0a1ba437916b2028eaba8fcf71de83 SHA-1: ea4822406797b14c76333d875e47f03f88c010a0 SHA-256: 5c9774a0e14737c422fb488a519762b2e7410b21aee344e9dd2dffb2a29dcea6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm designed to host further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading malware disguised as legitimate software or files. The embedded JavaScript is likely responsible for redirecting users to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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 https://irlanc.ru/uplcv?utm_term=swordigo+apk+download PDF link annotation
    • https://rougezenekar.hu/files/file/17693904037.pdfIn PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/26614384302.pdfIn PDF document text
    • http://marisqueandopremios.com/campannas/file/gukakenedom.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/10177600998.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/doxufilepokesubowubiba.pdfIn PDF document text
    • http://ux02.wadhost.com/js/ckfinder/userfiles/files/sigosuti.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/10267324578.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/jijelijuxububemakakoj.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136a407e7b61---16485502260.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/63101377078.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/utisotugifazenol.pdfIn PDF document text
    • http://villacappuccina.com/userfiles/files/mukemapupa.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161310efa7c6a4---62184141187.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/nulonatolosimumikivelitiz.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/sorujudakodalosose.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/41944013870.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/berawagetepatenexexuziru.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/90445411558.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/razedojuwaxaxamekifajekaf.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/lukogujotuxamipuvifedi.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/56163617238.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/99296073929.pdfIn PDF document text
    • http://www.gc-antey.ru/ckfinder/userfiles/files/monejer.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_off0000d871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD871 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 17576 bytes
SHA-256: cea2a3071965a7385b91b00fd1f75864917285cb0b5a4222f29bf3be7e3c7c8c
font_02_sfnt_off00011d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D94 10424 bytes
SHA-256: aaf465c8d86409995d37c8235cdba6bbb50d5d137a37c24c271e43a07aa466f6

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