Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dff8292b1e316a1…

MALICIOUS

PDF

97.1 KB Created: 2021-07-18 17:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 87d629513b68148af344c8120455e779 SHA-1: 6e2fba44be5c4919fc9158984dce51ca47d2e906 SHA-256: 0dff8292b1e316a126bf519c0c5aa0e5ca647ca9bff874642a861e801708fafd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm with numerous URLs pointing to compromised WordPress sites and other domains, suggesting an attempt to redirect users to malicious content or for SEO manipulation. While no scripts were explicitly extracted, the presence of numerous external links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d92376157a5---98978835220.pdf In PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e18fde45e---rimivesasabomesuzuvezed.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/duraxunomifidem.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/xujisimikumabitunonus.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a50b826c145---minifife.pdfIn PDF document text
    • http://stylekd.ru/files/jijewofugugopekixan.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/76057683869.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/74b1f23ac4b5c8627504bcaff4507a8a/kimozaxanazafaxexugikalod.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/rezakazuxozikonuk.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c5bd8b7ec3a13f188a63772c9bbba0b2/80255109677.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/46356205385.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/82244909505.pdfIn PDF document text
    • http://huntland.hu/upload/file/74307856399.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/9eb6uih8je5f88ggbrs1kd2801/zenikafefoduxeriwirar.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b3882aecb---2733893415.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dc1330661---vafefegewe.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/94160179526.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/b13c676d7a3341ef665ac64b4b67ad6c/zatukabotibafakaf.pdfIn PDF document text
    • https://energooptima.hu/upload/File/72502485220.pdfIn PDF document text
    • https://uniontend.com/userfiles/files/nopuvarirewesi.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/51395800356.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160971b5bacbbc---63214063430.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a9b776f59---zugati.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160733899d4fb5---xosidusijori.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=the+other+prodigalPDF link annotation
    • 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_off0001189f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189F 10364 bytes
SHA-256: 9d5c4b4805b04888d7989bd4cb7a4762e4d8770f46501d94cfc8bc6272bd052d
font_01_sfnt_off00012fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE4 18708 bytes
SHA-256: f469944191196b329c00d6d1b9aa6c93338cd9eafd365e8458081c131c864856
font_02_sfnt_off00015f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1