Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc55de8a4d7c4884…

MALICIOUS

PDF

72.0 KB Created: 2021-09-15 13:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 509a9eb1bb60d871221ec9c900b03a4d SHA-1: e847382d0c63f761e7c7e7ec06c7a6c5312c4d1b SHA-256: cc55de8a4d7c488490021b84447f631d65573ed2b443e4d2786faed2f341836b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one specifically pointing to a URL containing 'black+panther+full+movie+english+sub', suggesting a lure for pirated content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links hosted on disposable domains, a common tactic for phishing or malware distribution. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=black+panther+full+movie+english+sub PDF link annotation
    • http://3e3i.com/UserFiles/file///92618331417.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/goliguwobodewutisa.pdfIn PDF document text
    • http://www.slenderclub.cz/ckfinder/userfiles/files/59770181387.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/93091042602.pdfIn PDF document text
    • http://planbmedia.hu/files/53755657037.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/rupuxajazizagakimufeku.pdfIn PDF document text
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/93185891976.pdfIn PDF document text
    • https://jocafoto.com/fotos/file/mizome.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/vovisinefusatek.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/nilumopapiji.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c6edc6b98---54535294288.pdfIn PDF document text
    • https://toscanafantastica.com/userfiles/file/3477782115.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/rogopikolakodabowonamo.pdfIn PDF document text
    • https://digireg.es/upload/xinetedake.pdfIn PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/kanedojorekovaridom.pdfIn PDF document text
    • http://wyadonline.com/userfiles/file/fibubadetugax.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/favugi.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_off0000b425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB425 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3C 11380 bytes
SHA-256: f0bf1d16ec68e9df31454800fece00402a930fa052e1038ea5391bdb12b30ea3
font_02_sfnt_off0000e6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B6 17024 bytes
SHA-256: 292c98cc1a918b5b978712e31a8a401c91dfacfb155366676e61d4255f43c2e4

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