Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd29c9e4af8c750…

MALICIOUS

PDF

88.1 KB Created: 2021-06-29 20:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e4ff8375eb4d832bbf9ec039a47d7ccb SHA-1: 964a10b7c5d0c11cb5e1236416b5751d779001b9 SHA-256: 4bd29c9e4af8c750bb8b6867af9d9e8e5ea08ef02249e22e17d3d4f9f9cbd357
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ace5509d56---vipizeseduro.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/0805bff002f624de86ca28cc177192d3/32629877756.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076155ab47f9---81976025064.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd754464fb---danijuxifenobepawod.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d471e40ccf---50348165776.pdf
    • http://irinaburmistrova.ru/files/38838386392.pdf
    • https://kermoulin.com/userfiles/file/56839190425.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946583e894c---42962514846.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/7feb9a6ed1743862674275efbc5bca3f/takizusifizurek.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2ead747c3---mejibowefi.pdf
    • http://trustarshida.co/cache/fck_files/file/29387068938.pdf
    • https://aimara-bg.com/userfiles/file/58702482368.pdf
    • http://illinoislivestock.org/userfiles/file/92111510700.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/uuog1qho68u4knt0p4o8s7c4l4/95274824290.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c62ac0bf43---defekapisudipali.pdf
    • http://lyshiying.com/d/files/funenuvudewojirokaza.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16072ae4b71c76---fekovuwomapodamajabanal.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/90ba9712a57a381976d18adc438f0b5c/78035705421.pdf
    • http://hsi-international.com/ckfinder/userfiles/files/72391110023.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16097d09bc7ece---11362971888.pdf
    • http://alnoorcity.com/userfiles/file/jawebowujakag.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/655d59fcd20f7fb41f58ad1cb200c4c8/7586095838.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608374c7e8951---sevomebulefudi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=lesson+8+radical+expressions+and+data+analysis+unit+test
    • 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_off0000f224.bin
85e19ccc92107340d2bca4ce7657cb03cb9a75897ad549027ced0315805aa3a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF224 10988 bytes
font_01_sfnt_off00010bd8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD8 16792 bytes
font_02_sfnt_off000123ea.bin
4e25426e62b49f7f74ae0b5fa11b315c6204357f8c5a58ef18d753c314f19c08
pdf-font-stream PDF embedded font (sfnt) at offset 0x123EA 18220 bytes