Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bf26b771b6877d…

MALICIOUS

PDF

88.2 KB Created: 2021-07-13 06:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c7f131e54a1eda4e406ff0df0efd8df7 SHA-1: 902ed1868f3ec72684cf833b3b6553609677d14d SHA-256: 14bf26b771b6877d84c3ad391f208d4af2fb1c56db0d9218d16f368ad600d0e1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites, which are characteristic of phishing or malware distribution schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://krikrik.ru/uploads/ckfinder/files/sifefazaruge.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51648b6b17---lurivuwobujekuzojeral.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e83d02fb6---notukonobinujive.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/v3b5nm77qoio1jklupe7kq94km/suwuju.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad5e0204f8---37812875449.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/7pv08vc4fvj75ml3liudgc05e1/89437122953.pdf
    • http://desushibar.com/userfiles/file/siromifubejezex.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/3akr1up23sv0fjdps8lrcugo7p/40114608177.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160abca946a6cb---juzamelizetozesajuwokirid.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/1da25aeb1066c3ea1bce5ffe76e1685e/tusamigidaziwos.pdf
    • http://autohondl.cz/userfiles/file/movixedazowukabuxojaxen.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef2987a9ff---wobatalaripepogulobu.pdf
    • http://roxburyhs1987.com/clients/63080/File/javanowagurefujuresiwe.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d22fa22c58---sunabelivo.pdf
    • http://royalwedding.jp/images/blog//file/jorugiwug.pdf
    • http://gloucesterclassof81.com/clients/23558/File/60142724451.pdf
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/24246748709.pdf
    • https://partnermind.cz/images/files/45342638050.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d8a918e4e---geweret.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6df241e70---fezopulitusapulujodesetu.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/a77b015d13c12bc0b8f15b81134dca61/29822927728.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/0f8b08a2b19f2237cae1e335eab1cec3/romivadonazolowili.pdf
    • https://digitaldaya.com/imagenes/file/40913976023.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160994e8798ff6---30721609440.pdf
    • http://phantasos.org/userfiles/file/tazavovuvufotepajojisez.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/6a1a0d04d16f98f10e4ecebffca7bbeb/64375508704.pdf
    • http://ruihuitax.com/files/file/ladebesaxepala.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160802d9f931df---12851384653.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=calories+in+a+bottle+of+red+wine
    • 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_off0000f51a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF51A 16792 bytes
font_01_sfnt_off00010d31.bin
453f5c9406683c3f3680a524dcb804bba0233bd0e930b86b06565a2867f0488b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D31 10604 bytes
font_02_sfnt_off0001259c.bin
42d917a721028c0313d26e38bb5e0c93f0e888bd91fdfff55eec4fd5aaa33b91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1259C 17436 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.