Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11480f1449de9a8…

MALICIOUS

PDF

98.4 KB Created: 2021-06-29 04:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef8fa31beeb5a33387fe6c6b1f5640f4 SHA-1: 2e690efe58559c643b0968316d4d1f8a3940a408 SHA-256: e11480f1449de9a85500b45d05b52ccef1633376d3306172843d39f64cdd11de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress upload directories, indicating a link farm designed to host malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

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://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/ad75ed9340792a847ef060c081fd4185/kejozomerusedo.pdf
    • http://amphorabeautyclub.com/campannas/file/9333319574.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bf49769e7---73282198007.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c65fcd9d0b---50465961231.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/buqa0sjcn04udnepllqqmt4vn3/86587455761.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/60518739f8599bed4544774a6c04f40b/nesarubo.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4027b72f5f---xixepoxedudixajega.pdf
    • https://2acontractor.it/images/file/venekudotexalalek.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf2c97b14b---71020119950.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/4tfci7fujp17huhm3utiesfo67/nelotafuzujufe.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aafd190cbcf---20083241829.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/phn6o5b20npk4v9eqfofjdn4c0/wujasaxotaxozo.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/ae778e478d40c7361072b37cdbd44ed6/65094575338.pdf
    • http://quiltingacademy.com/fckeditor/userfiles/file/vivan.pdf
    • http://beepost.vn/upload/userfiles/files/viloluzujesavojis.pdf
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/papidevuxokuginobasom.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a73095ab5a---tikibe.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160856da540181---gixepelit.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da471a0b4ea---36589782612.pdf
    • http://immopolignano.lu/images/nikejuwerudeniputedo.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/e8aab666943d2bd4f8bcad50bbe07a5a/81534388977.pdf
    • http://netisiletisim.com/guvennet/resimlerfiles/vugadajarukivamasepati.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca5858dabda---46427208289.pdf
    • http://aftckwt.com/uploads/file/40105188524.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/f7b2439ff86ae9c288aea9db405d132c/suxadalikadubofuvon.pdf
    • https://myclubowners.com/userfiles/files/tajasugibiten.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=frontier+snowblower+manual
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101a8.bin
870147b8728aaa087401e1031f2198399a94608a5d0438bff5c5db9c27b51ad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A8 19700 bytes
font_01_sfnt_off00013616.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13616 16792 bytes
font_02_sfnt_off00014e2d.bin
d8d613ccc27198bcd2a61ce06cf8577e0daaadb346a55c68a34427aa179a22c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E2D 10572 bytes
font_03_sfnt_off00016652.bin
0c2b66edfe01c4b4b6bc34391b29ce460a408e15cf8dd5964934a88e04e5de03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16652 16176 bytes

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