Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbbca2ca2c1cdad2…

MALICIOUS

PDF

83.0 KB Created: 2021-09-12 18:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bc1d483df4eff5369aa4e1d7e31eb7d5 SHA-1: 004504924127241c2a31ba2b43825db32cff8f0e SHA-256: dbbca2ca2c1cdad2bb7fe0bc15c093d598eeb25a682e36a9eb148f49fb184706
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to link farms on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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 http://exosportsante.fr/ckfinder/userfiles/files/ragaxatipifimixovefezot.pdf In PDF document text
    • https://canevastoilestjean.com/upload/editor/file/vajozewurivelabe.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/tudekixakuwupol.pdfIn PDF document text
    • http://xhzhengli.com/upload/kadog.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/mqamcj8rc85jjf5oc3ahsom6i2/danimegukagevawawejigoxa.pdfIn PDF document text
    • http://miyisz.com/mingyi/images/userfiles/file/57141048836.pdfIn PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/jedow.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/melolafapisu.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/rufawifakupobuvoxupafil.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/64767974992.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613916a143dcc---zixugodiripoluporulejos.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/kapavajixuserakiso.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/67522059943.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa65266d81---76743938706.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/52559856220.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/mavexiberazivepu.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/revijo.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210906_8B6D0B5B1B9930F5.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/vomamiluloj.pdfIn PDF document text
    • https://eingangrad.ch/userfiles/files/13474350315.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/kuvupakiperidadekipesimaj.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/mokowija.pdfIn PDF document text
    • https://umutfm.com/resimler/files/88373069797.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=skam+france+season+1+episode+6+english+subtitlesPDF link annotation
    • 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_off0000d7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCE 19460 bytes
SHA-256: af08d6b1f43c5abf0d7ed0c96534b380d4df4f00ea501b41d88e0f6a54623a8d
font_02_sfnt_off000122a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A6 11696 bytes
SHA-256: 7241338bf13366cde566bd4217b8ce97db2b978c38a0dea58309e2bbf4d0321d