Malicious PDF — malware analysis report

Static analysis result for SHA-256 f707dad30bffff78…

MALICIOUS

PDF

83.2 KB Created: 2021-10-11 16:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0347acfdbaa3bb6176413bb7d0bb8b37 SHA-1: 60f623a97b6e3babdb49e65db3048669a3f752b3 SHA-256: f707dad30bffff78672933a34e8085845d7ebec705873af7135213ac79240fd3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to disposable hosting or compromised CMS uploads. The heuristic firings indicate this PDF is part of a link farm designed to redirect users, and ClamAV detected it as a phishing trojan. The embedded JavaScript likely facilitates the redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 https://huntic.ru/uplcv?utm_term=organic+chemistry+paula+bruice+7th+edition+solutions+manual+pdf PDF link annotation
    • http://doradcyprawni.com/images/pliki/65426402257.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/2339060704.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/vatizivolonagoda.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/devexeterotidexudojojule.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae9815e124---55724744467.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/39399074963.pdfIn PDF document text
    • http://kamakuralosgatos.com/uploads/files/26082566505.pdfIn PDF document text
    • http://futboltotal.net/images/files/pasavamugomuzaku.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/mavuvepubozekezisev.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/ukikvqmeiriceld8n2v7er983c/bolam.pdfIn PDF document text
    • http://longbienco.com/js/ckfinder/userfiles/files/48633552015.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613778b1c67c8---nabiwe.pdfIn PDF document text
    • http://gibisch.biz/files/files/24636000261.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/b4e79e1993739b613209ac5d0c6638b3/xamijivixosaj.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/83880097073.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/23466044186.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90740766289.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/78723b86aa9bab313e888f888e07dc4a/zedug.pdfIn PDF document text
    • https://grandegroup.net/files/88007007275.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/9b4f7bd97bab69ba56fee4a0b9c17536/92234146375.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/tasafotubogev.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/88361450736.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/madokalo.pdfIn PDF document text
    • http://mqskin.com/luutru/files/xifuxobuxo.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202110010725196890.pdfIn PDF document text
    • http://antitumor.org/filespath/files/20210902144834.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/14669823375.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67E 17780 bytes
SHA-256: 85874acb0480ab33ad89e5d975c94a575d9d9630b7951ab086cfa06f8d601366
font_02_sfnt_off0001242d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242D 11496 bytes
SHA-256: 9eaa814872c165b4ab44d7915046041d79c2eeeac22747944a92a78daddb8618

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