Malicious PDF — malware analysis report

Static analysis result for SHA-256 906e7db0f5e45b73…

MALICIOUS

PDF

80.0 KB Created: 2021-06-26 01:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b8398b8125536485151048c88659ca16 SHA-1: c328ba07fd2a5be7b1fc7479cbfcd7b855e8fdcd SHA-256: 906e7db0f5e45b738d3c9de8d3537f2e318a6ee7e47d89c237cc123b48c65d32
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, or parcel deliveries to trick users. It contains numerous links to external websites, many of which host further PDF files, suggesting a link farm designed to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://ketchas.ru/uplcv?utm_term=o+level+notes+pdf+free+download
    • http://interiorconsignments.com/media/file/dozisavari.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b54896ca498---81081219822.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091809ca3554---vumekula.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608525539706d---51129346159.pdf
    • http://valeneighbors.com/userimages/vojojapodapeb.pdf
    • http://anhbanglaw.com/userfiles/file/70648040361.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606da07739f28---91630065756.pdf
    • http://jcbcharpentebois.com/ressource/site-image/files/5559991552.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/poe4kl7s1q5qstst701jm8vpp2/petavipadobuja.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/rq9avq28vs8ac54c58n68qt1jr/rekiwin.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/rttcgpc7i73u715b5uu9legme7/kodipuwanisoji.pdf
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/25f4e0788102fea2c64f73b4b1837ab7/49558204319.pdf
    • https://hostingyuvasi.com/calisma2/files/uploads/36680149713.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160982daf77008---xoguzadebuji.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160abe6ac2c932---wofepowivaxewotaxirujer.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2ea9a9e4---24125467789.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/9186299c577b6c8d59a4d5591e82bc66/pigoridiwawanimosivoxuzo.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160af9dc750d62---tepuluwu.pdf
    • http://gomientrung.vn/uploads/image/files/12347615172.pdf
    • http://beergolfers.com./blog/images/file/83359822737.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/9ec434e41db48076a444740746c7be15/jeneka.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cbee46c11---86590688097.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed54aa0c3d---56905197156.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608343e945e67---56542392398.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160856aef82453---zewasolinobi.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_off0000d263.bin
d572e458667fff20c52b0e4297268b2916bf4dcfba3cc13e5192cfeb20a36901
pdf-font-stream PDF embedded font (sfnt) at offset 0xD263 10576 bytes
font_01_sfnt_off0000eac3.bin
21ebcda62a8795ebc450c92e1ff35c185f05b5e366a8a8d92599e447c28dbb93
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC3 17988 bytes
font_02_sfnt_off00011a99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A99 16792 bytes