Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e1143187543d8c…

MALICIOUS

PDF

90.0 KB Created: 2021-06-26 01:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d73c4001e36058a3c28debe83eaa9e0 SHA-1: 3a14b46b31b6f21ad2ba0eedfaf1968b880bdb6c SHA-256: 30e1143187543d8cb55b6cd635d06577eba955153508969bdca2532cca110e73
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users into clicking malicious links. The presence of multiple distinct hosts and the use of UTM parameters suggest a coordinated effort to distribute phishing or malware content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=how+to+stop+receiving+messages+on+iphone
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160727b90af78e---vazuzaxugagog.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085f149f3442---15465465654.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b301baeb87---rewomezironukaxojeku.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/9cljf5phaep865ekeb3856mag1/vijutatezolofutemanetu.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cf04a2c26---33261046294.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a73df99727903ae6f6eadd216b83ea55/zofibetaj.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c407346fe89---kezogusizalagitinijul.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607c35774d7c0---vewubuwujavurij.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607056513a44c---14862393147.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/57a0899db05dc3ebbed8278c06671079/witavopikokuzesebigesa.pdf
    • https://mojer.bg/files/48814526203.pdf
    • http://a-daily.jp/app/webroot/contents_img/files/79448733259.pdf
    • http://technoculture.cz/admin/upload/file/nogozaxu.pdf
    • https://nepalipublisher.com/ckfinder/userfiles/files/73091502357.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c21bceefe9---mimajabetoto.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606f36042e8ef---63045351791.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/3fe90beed9ceac500f43aed627983e21/1572998824.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/5pf8ovbstvnj7lrufa6on8hs0u/63535914587.pdf
    • http://thoitrangvabaoho.com/Images_upload/files/garimusidopevabatamefujom.pdf
    • https://alrukn.co/userfiles/files/41583458033.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/fobepevibonigazavatova.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5748e93ef---74391186144.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d5c59129e---tigarowawukolajak.pdf
    • https://abugfreemind.com/userfiles/file/komav.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_off0000fa1c.bin
4694cdf7ca24f919c3dd164649aa654de445b8e2d13ec6c30b1320e7753f61b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1C 17600 bytes
font_01_sfnt_off00012776.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12776 16792 bytes
font_02_sfnt_off00013f8d.bin
6bfcfc911e866b24998d736b678f9023916ff6eb86ef869837284f6b0caefd73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F8D 10920 bytes

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