Malicious PDF — malware analysis report

Static analysis result for SHA-256 33966e7373f0ea1d…

MALICIOUS

PDF

104.4 KB Created: 2021-06-27 10:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a75e419e3b3657864edb6162346a5a87 SHA-1: a75bad80e806fbd83a1d75684659ac64b2c8e654 SHA-256: 33966e7373f0ea1da209f6513ba7d1f97443ad684a5a3be768a7830c16817645
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be directing users to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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 http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/26591684360.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c53d7302146---16063332305.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608adfd9a0888---taregimonurinupinepo.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16083ac2663dbe---30636397205.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6748a80a9---1201504760.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a13f27f05b---fepovikufilogifiwamepiw.pdf
    • http://seabeachthailand.com/UserFiles/file/waxovusubuziguloluriko.pdf
    • http://alliusie.com/userfiles/file/91008157073.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/o35ffmu9j20cc3dq881bhighpj/tobuvemenajomeg.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/clk3iqt23piic9ndqhi69iq759/fubokovokusuzizenuvoneda.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/842c6a5bb42bc43ccd268cabe78df58f/65492228762.pdf
    • https://mehreganimaging.ir/images/upload/files/1227708801.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5913e43cf---17218970333.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/c452ca7c0391e6208ba0504c8fcfb1c4/wobibadepidefilu.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/jkl358mic4cfrqr0pu4s62o734/vinaxagotowejosozali.pdf
    • https://csodamalom.hu/files/files/worifejesakomul.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160d27e5335777---bewatifuzoverisora.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/km8dojt2q3og7qju47vr95ours/17615730205.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085049269054---zunagi.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b960a4d9ee9---12010673726.pdf
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/roguzekime.pdf
    • https://anfauglir.com/images/file/sixiwavegugavadagi.pdf
    • http://ajisushionline.com/uploads/files/dafekufivuveboxeno.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=drink+water+after+meal+good+or+bad
    • 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_off0001332f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1332F 16792 bytes
font_01_sfnt_off00014b41.bin
5da5a557712e76b18bf347fe9da183ca2e61c9135cfee579f28de6569d790256		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B41 17784 bytes
font_02_sfnt_off000179a9.bin
4530017b9fee65cc9d3ed609fa20cfaf08e32f68eef584f416802c9d8b5b5358		 pdf-font-stream PDF embedded font (sfnt) at offset 0x179A9 10848 bytes

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