Malicious PDF — malware analysis report

Static analysis result for SHA-256 9060baa96317af13…

MALICIOUS

PDF

107.3 KB Created: 2021-08-11 22:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7716d1ddbe7cff713d4b1bf43ce0e4be SHA-1: 6d1d5fd6f1b693773c2a2fc8c5ed6e40b6307c68 SHA-256: 9060baa96317af1373cca4036d914df7f37da9704b385dc5987e52cc401a5b4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external URIs, many pointing to compromised WordPress sites and disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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://infrive.ru/uplcv?utm_term=kundalini+yoga+asanas+pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/h508e5d0t3eg1443a7jrtnqpco/repavojutirumoki.pdf
    • https://majorsagilekvaros.hu/uploads/file/bibinerisozewimuvodajajul.pdf
    • https://gw21.ch/uploads/userfiles/file/rujisewidikaruga.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c77be21adf---57035859928.pdf
    • http://ticaproduce.com/ckfinder/userfiles/files/fabowadigiwutilisonezeru.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/73c08948e50021df372a2baa0c04bd8e/58190903910.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608763b47fbac---momiwadiduj.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/r0prtuuch6icq1defokn13cpck/felis.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/381geoj9tdgghedggkl02r9po6/66243648585.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/fdaa32b0bae213adb6560c4b0e68ad4a/marifobabimajuwubur.pdf
    • http://titusauto.hu/kepek/file/tuwub.pdf
    • http://hncastlecable.com/d/files/54090582083.pdf
    • https://confidence-ist.com/ckfinder/userfiles/files/paxadamelovesuvane.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4df47d8d16---36229974225.pdf
    • http://samnakthodrahassob.com/userfiles/file/pifakulipupa.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160b3db350a9c2---99323442067.pdf
    • https://www.leasing.net.in/ckfinder/userfiles/files/gumijakepufuxelimus.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cae89dda05---gepisikalojujuretusesor.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c68770f0236---61334776282.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/m1f6ee5smdof19jpimppipaeuk/45354772540.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/cd9f202f4fb0752df9e853cab2779489/kavutarixodebesigen.pdf
    • http://grupophi.es/uploads/files/rijijiw.pdf
    • http://ridendo.cz/files/file/rizepow.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722d3d34d6c---70646321205.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097297154215---82849086307.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4bfca65f9---mumeledosefolav.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_off00013b45.bin
c0bbe46beffb5843bbf50921f48adfedadf59a435dba55bc86cbad18a4ddfb43
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B45 10548 bytes
font_01_sfnt_off00015328.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15328 16792 bytes
font_02_sfnt_off00016b3a.bin
e7fe6cfbc91f94f5c3125ae3cdbb6137899cfce0ea918b28098fcc93d8232b3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x16B3A 20408 bytes