Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bebba93bcefede4…

MALICIOUS

PDF

82.0 KB Created: 2021-08-28 20:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2b9ed28a36432a01be6b97eed0f33dd4 SHA-1: d695856378470db5a202892ea5233e01de98b1b8 SHA-256: 7bebba93bcefede45c2e71d2ba764dd433cf959266723bd8fa00b51b542d2607
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://infrive.ru/uplcv?utm_term=crosstour+action+camera+ct7000+manual PDF link annotation
    • http://miyisz.com/mingyi/images/userfiles/file/94774949574.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/tufasonuxofalu.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/xavopoluzereva.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf4d69f7e3---75124084073.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/u22309luj85p4paqld5cflp2v6/56057961758.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/575b60ecea134ab12fbfd5c817e1ffa4/34438702360.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3acd8b8eb---daxavogajetij.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160894d5b03b89---72196583698.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/mawipuvamowuzimo.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/sawofavixisonemusagufovi.pdfIn PDF document text
    • http://ausafe.net/images/art/files/95544336735.pdfIn PDF document text
    • https://fivetc.net/uploads/files/51075391450.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/sd0rrcqlccdcc9g6eovlu0ecrm/17807189986.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/e1d1145f4f467474f8010d2a3ad0cb59/54674017932.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dc67f3bdf58---wapuxof.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/16503014553.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/sagobesizepuwenibozedo.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/84891031508.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160989a421abbc---jamuzapojofegetoxu.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/ruwubumuwenuteja.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/funegisevotizi.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/pesizu.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/abbd102299e9c5377af136b76ab1ba0b/rubezuzasinoz.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160abfd29790dd---lurifuzegofovi.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/7vpnj95njjo3cotubsldvru361/revuzenixaxerisixejekuru.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_off0000d985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD985 10692 bytes
SHA-256: d81bfcc6b379f1507c95fdc93451cd7d040f5873db336e505771e32852f040fa
font_01_sfnt_off0000f21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21F 18576 bytes
SHA-256: 1b1e9980aa7393a44c4d09b14a55aac32417240658f5a96b1b0a29b4e350b938
font_02_sfnt_off00012238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12238 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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