Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bea0e1c9ca178ce…

MALICIOUS

PDF

84.1 KB Created: 2021-09-04 12:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5ff245990fd16021048334ae6f5eba6b SHA-1: b394bc28d7fdb7424ed01dda30cc1e271ce66275 SHA-256: 6bea0e1c9ca178ce0ad67504c7060afb491713c6c42196717b82779dc1a3dd48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous external URLs are embedded, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The PDF structure and embedded URLs indicate it is likely used to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://inwebjor.ru/uplcv?utm_term=manual+terrestre+oie+2016 PDF link annotation
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/318a03ba831d2d9735fd4ab746a4d512/43450087141.pdfIn PDF document text
    • https://spacio.hk/attachment/file/77830939972.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/c76123ed14aa949334e65327043a7db0/rubenokabipiwurewu.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4af1f043a---gekodef.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/64996162628.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/nejifunumijaloxexo.pdfIn PDF document text
    • https://taumed.kz/upload/2021/09files/210903094854293214v58hh.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f66931b5094---lonakobadalitoma.pdfIn PDF document text
    • https://lombardpruszkow.pl/local/userfiles/file/23633135186.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/n4ha6ijtprsk8d14tjltt1c1ei/foniva.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/903de972e29dd7f89fb8459dbce9fce6/16022421331.pdfIn PDF document text
    • http://changju-hotel.com/CKEdit/upload/files/kaxuruv.pdfIn PDF document text
    • https://club-sports.net/uploads/products/files/62485322042.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c86a4d285c---95707845625.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/41567508561.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/latukiwi.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608744dfb675a---bumukojovaretebamopumojir.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/mepeziniki.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7e2f33ff5---bevirosuletarebu.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/48905700640.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210629/file/16249529184866.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/49500554884.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/42119532244.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_off0000e352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE352 10656 bytes
SHA-256: 645f6e08509be8576a58685b09961036a6ed027657390a4a0b5150e07338fa59
font_01_sfnt_off0000fbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF7 18080 bytes
SHA-256: a7eb8ec647152adaa2f0f35e6c3e069845f644dc87df3db1c92724c10c27d13d
font_02_sfnt_off00012ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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