Malicious PDF — malware analysis report

Static analysis result for SHA-256 3beb356f7e8646d7…

MALICIOUS

PDF

69.4 KB Created: 2021-09-26 18:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd5ae6ce779eb7bed7434230cf889c2a SHA-1: c3bc4d3d0e7d8ec52ebd4e517ee36e957d53ed3e SHA-256: 3beb356f7e8646d74d452e028e8b80b752f7ca6d56a9f0620daeff8e29c969f2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external resources, with a high heuristic score indicating it functions as a link farm. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the attack pattern of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pistant.ru/uplcv?utm_term=apps+of+shah+gta+san+andreas
    • http://gnox.vn/upload/files/81251452835.pdf
    • http://byty-pardubice.eu/UserFiles/File/56631962707.pdf
    • https://ldcpc.com/ckfinder/userfiles/files/69916180142.pdf
    • http://kronospan-mofa-hungary.hu/editor_up/12515200469.pdf
    • https://kiofruits.com/admin/uploads/files/3440338362.pdf
    • http://adgroup.co/userfiles/file/26825900171.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e078d8118a---38141852650.pdf
    • https://0955205219.jwa.tw/userfiles/files/99301740035.pdf
    • http://pradakshinam.com/fck_uploads/file/mebudabupegenofebobilane.pdf
    • http://wronba.com/uploads/wysiwyg/file/litapavutikukux.pdf
    • http://guojingmall.com/userfiles/file///17276273436.pdf
    • http://delannahotel.com/user_img/file/44935037103.pdf
    • http://iuoooo.com/filespath/files/20210901100339.pdf
    • https://trinityautorepairs.com/uploads/files/favodemetovodaxom.pdf
    • http://maryalo.com/userData/board/file/84107180200.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa3791e016---woxir.pdf
    • https://bongkartuantakur.com/contents/files/kibiz.pdf
    • http://lumieye.com/userData/ebizro_board/file/79859971629.pdf
    • http://www.atsamuihaus.com/image/upload/File/niliruwawizorozeb.pdf
    • http://jr.ac.th/ckfinder/userfiles/files/15553951415.pdf
    • https://anukulagrotech.com/ci/userfiles/files/4765015100.pdf
    • http://gbfrjournal.org/pds/userfiles/files/10525025139.pdf
    • http://nawoo.net/userData/board/file/gufoj.pdf
    • http://bjjiffy.com/upload/12837552616.pdf
    • http://kirche-treuen.de/UserFiles/File/pupirujideduzetusojobozoz.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_off0000aea3.bin
efb11c6e78f735a550a7ab239e0f7e081376879bac761969ec0168efbd2aac33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA3 15512 bytes
font_01_sfnt_off0000d62d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD62D 16792 bytes
font_02_sfnt_off0000ee44.bin
42894c19d891f0963e7bfc8617db7b1cf6d8b53bbd7d76538e0d5ae4ed843a12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE44 10620 bytes

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