Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69e0c0772a9679f…

MALICIOUS

PDF

70.8 KB Created: 2021-09-25 12:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8b40bdd892974cd04724d588035f49c5 SHA-1: 4cb01044387f29657e0ac580c9e20682aceb0f11 SHA-256: e69e0c0772a9679fc80889aa19bee5de59c7ab4ec077f7d358628c838af36b5c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or leading users to phishing sites. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirm the attack pattern of directing users to external, potentially malicious, web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://catamma.ru/uplcv?utm_term=harry+potter+1+full+movie+tamil PDF link annotation
    • https://gopherscopes.com/userfiles/file/dodegidase.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/629d24c1a2c086673e6d04f35d331e98/bijasukeru.pdfIn PDF document text
    • http://lagrupacio.cat/file/puxadovetogodarod.pdfIn PDF document text
    • https://tivicom.vn/upload/files/wolokabejux.pdfIn PDF document text
    • http://dc-42351dc5a6b3.prshots.es/uploads/userfiles/1630713287/files/bevekepikisalawovorebapu.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/63558970286.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/vakujatazedel.pdfIn PDF document text
    • http://theflowermaker.com/uploads/File/79015583680.pdfIn PDF document text
    • https://dm288.rs/slicice/file/nemukutidojonovepajozi.pdfIn PDF document text
    • http://nextgenship.net/upload/file/2021092216323092711.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/sivedudewuvomoxel.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea25d03ae9---43337295659.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/97903548294.pdfIn PDF document text
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/87998797796.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/kabolal.pdfIn PDF document text
    • http://runnersavezzano.it/public/userfiles/file/71567714413.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/tidofe.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/fagepotasukaxo.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/24851951361.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/mevumuvepeporot.pdfIn PDF document text
    • https://festacontinua.it/public/file/lejejagifere.pdfIn PDF document text
    • http://clubsahdianagalati.ro/upload/editor/file/42525082322.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/ruradel.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/manisarijesomivaw.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/10817425594.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_off0000b451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB451 16252 bytes
SHA-256: 0011988f0c228724605064905b5ff733b122984b8d98e9b657b86c150b18a2e4
font_01_sfnt_off0000dd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD38 10568 bytes
SHA-256: cef8c4b4eb129157fe59ec3b59182cea55d87aeaeaa6ba543ca01d7a159e99f1
font_02_sfnt_off0000f569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF569 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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