Malicious PDF — malware analysis report

Static analysis result for SHA-256 5047359b63dcaf7b…

MALICIOUS

PDF

73.6 KB Created: 2021-09-10 17:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 314c3cde515fbb6b90b7c349636c7a60 SHA-1: 607fc1a8348efa38c930b7c511cedfcd1825e5fa SHA-256: 5047359b63dcaf7bc5bca4072b42723e1b4639ca12442ad70f8fd1346fa100b1
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic indicating it's a Pdf.Phishing.Trojan. The PDF contains numerous embedded URLs, many pointing to disposable domains, and a specific heuristic flags it as a link farm. The primary attack pattern involves directing users to these external links, likely for phishing or to serve additional malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://cementfeet.com/userfiles/file/pavafagevel.pdf In PDF document text
    • http://iktoktatas.hu/files/file/lufukukubavureser.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/gonukuwodefoduw.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/mopitugewasifefogukeli.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/9102216058.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/99115937037.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/99535468503.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/sutamejekojobare.pdfIn PDF document text
    • https://negaratoto.com/contents/files/38102725544.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/zuzimubejarinejigevosifi.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/66920326759.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/12346022837.pdfIn PDF document text
    • http://autavrabek.cz/obrazky/file/35116362807.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/46824565153.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/31701413925.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/pefivitekinefezixu.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/54620992999.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/77639453723.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/75088109123.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b43325104---dilupezubuxobivegel.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wumelejobubituvu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=what+is+talkback+on+my+phonePDF 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_off0000bcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCBF 10880 bytes
SHA-256: c46dce27a9da5bb8296dfd00ff2d959d4cbea6f74cd62eac031374b31640575c
font_01_sfnt_off0000d58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9E 16972 bytes
SHA-256: 56939f4af96468e10f128482653f1f8ac09ee65d3ea65ffa8143608829dfb001

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