Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bafdc98f2edd259…

MALICIOUS

PDF

74.5 KB Created: 2021-09-07 14:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a60dd5487b09b695578f9d947c40284 SHA-1: c295ad3bd06be47bba5d2770b5247fdfb0fe8490 SHA-256: 9bafdc98f2edd25963a58b67e7d8f995b93ee12e3fc215de1b8f0a3009f8a5af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/e8bc0a65afb7cc1ab0074f3a0cadb0d3/26642574913.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/aa9a89662a11ec3fb875a70d3aad5e4c/29071132666.pdf
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/6849f7bd0fabe3274ce55bda0bc20f5e/xatujepupifo.pdf
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/dumavitexu.pdf
    • http://radio6deenero.com/uploaded/files/68023138346.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f204b9eff7---58848047865.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607e90e283416---75215880879.pdf
    • http://eko-inwest.eu/upload/file/87927859530.pdf
    • http://4seasonstours.in/userfiles/file/9010309563.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/f6fc8b309e2b05852d4bb2efc9f3a299/35759113370.pdf
    • http://intelekt.biz/uploads/pages/files/valukugomomo.pdf
    • http://hawkins-kearney.com/clients/f/fa/fa1934e8f236f3272fb98c88546bd003/File/simifisotun.pdf
    • http://essiac.cz/UserFiles/file/27388390321.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608417ae53044---22087935774.pdf
    • http://evohome.pl/userfiles/file/37008322732.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608689304a77f---xapikolofaf.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca20767f66---76425120529.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c6eddb5ef---xipakusikis.pdf
    • http://abarappresentanze.it/userfiles/files/biguwejelile.pdf
    • https://musikkursus.dk/userfiles/file/5687042422.pdf
    • http://ajtoablakcentrum.com/_user/file/lanerup.pdf
    • http://medicapoland.pl/uploaded/file/58845772667.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608075247bac5---21805559106.pdf
    • http://gamebonda.com/ckupload/files/wuximobopufamovi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=fish+amino+acid+benefits+for+plants+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E5 16792 bytes
font_01_sfnt_off0000d8f7.bin
7c696e6905e3c9241b22b8e7f727a0349de15655bd23de55b75771332935fdd2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F7 16300 bytes
font_02_sfnt_off000102ca.bin
df990c9920ecd0aee905ec5c54c82b15a1bfddb0609cae98307d0aba30e53422
pdf-font-stream PDF embedded font (sfnt) at offset 0x102CA 11000 bytes