Malicious PDF — malware analysis report

Static analysis result for SHA-256 376cc1b9b19dc38f…

MALICIOUS

PDF

85.0 KB Created: 2021-07-21 16:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3cbb515d83ab64f4442ad416653f8213 SHA-1: 750e471fd9ff8997114f1bb1b983dedb3e4280c2 SHA-256: 376cc1b9b19dc38f569c4210ef6ea2e9d696fead47de56b56453475722d5a084
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with multiple URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous links, some with UTM parameters, indicates a strategy to distribute phishing or malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://avondale61.com/clients/e/e2/e25739fb73bf6f2fbed92e75d980d6c5/File/pojarapimefifet.pdf In PDF document text
    • http://osc-pribor.ru/products_pictures/file/gedolesufojuga.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/e6b27336310c90d2766ff6311c22a8d4/ziwuzifadozefosal.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c724445f0---bubidakesafal.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/zemonop.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/86875233657.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/3c6efb97d55140a8c62563172e2f2e9f/10792406074.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876c645f9b7---wetupuvir.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/3ubea6ur7t54h58uffolpk73r1/41337585622.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/52172644217.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/0fa3743e3233290979cfe6dbf5219bf2/16620123964.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5bc498242---nuxunudewilogupoxuxis.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/60782023641.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/17eqhp3nucc0fglb3rkvm2a88a/61873510020.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/wogozesiserovusidazaki.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbecf458a3---41074441004.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/minod.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d65327c55---xanixosekukajemipa.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/24451003016.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608845c374c38---35153712373.pdfIn PDF document text
    • http://belhavenhighschoolalumni.com/clients/13962/File/23352746392.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/3919184037.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021732126237131.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=morals+and+dogma+pdf+freePDF 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_off0000e8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F3 10644 bytes
SHA-256: 43fe0e426c58ef27e70dca16f53782040aca12f91a2d15601899d861df2209f2
font_01_sfnt_off0001010d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010D 17652 bytes
SHA-256: e19b7665a088cc48c89c7baaa75807d06cbf4382407694c98f24ae9f96019e03
font_02_sfnt_off00012eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.