Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e6d6a9e0d83fec…

MALICIOUS

PDF

80.4 KB Created: 2021-06-26 14:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3eec1b8aa069b26e3f2200ba0bbea37c SHA-1: 9262c53a42efd5203a6cdabe34f1f743d5b2b802 SHA-256: d7e6d6a9e0d83fec588c94ee170d6aae055a0d29f78fd99edd6ce9c7e94c8c25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or appear to be part of a link farm designed to direct users to potentially harmful content. The presence of these links suggests the document is used to facilitate phishing or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://vincentpopetutoring.com/clients/d/dd/dd6b7bcf94cac99d3bed97cf8166637b/File/52611897419.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7ec65278a---salikekukakoxomesufem.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae98aace071---venafakatonif.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/788dd00373a43e2dea170f9169b46ccb/41245843442.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/bdbb3b13dd5b657c1a48f4d93fe1dbc1/wogozifuwive.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b06a3595065---15197937933.pdf
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/buzuf.pdf
    • http://allasclub.com/campannas/file/mijuziturekopa.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/40b063e599e34e580d4bf040806fc4b6/rebemul.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/957dad1fb104421f09c5cbcfbb85750a/62831681594.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075869b29cee---37684610810.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcc42126ac---fulubiwojemumodoremepalos.pdf
    • https://faresaldabbous.com/uploads/files/rutumikezi.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/a746ba7830fb611790ab0bb402821b91/22562740577.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/a071fb8b464abcd612406ee73a86288c/32287875642.pdf
    • https://kopari.hu/files/file/zivanizomudavuwanes.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bbf0fd2a86---tozagalazajojufanipo.pdf
    • https://dimensioninteractive.com/WYSIWYGImage/file/banoguzazedasisevesijumiw.pdf
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/33976591030.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b005df02ef4---19361541622.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa9b6936f6---radorumudarijituja.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/rr7sdo0not30285k934l0avbp4/3218146349.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077e1f213aa5---kiribat.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+attach+a+pdf+to+a+word+document+as+an+appendix
    • 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_off0000d7fb.bin
2548a10e4630b0bd41a54bde05a1872e5acf0e28371f93537fc3d4f9b65d7696		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FB 16264 bytes
font_01_sfnt_off00010200.bin
4f2361a208c2861d7df87911c329666d4d4ef02b8c78434e4d3d7f6bd3b10f0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10200 11120 bytes
font_02_sfnt_off00011bd6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD6 16792 bytes

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