Malicious PDF — malware analysis report

Static analysis result for SHA-256 832b48edc916e5ff…

MALICIOUS

PDF

84.4 KB Created: 2021-07-03 00:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 527673ffd30da55a8a8b7e6e8b3175e8 SHA-1: fa998db59ea921f4bb80096c2cf98622fccf9954 SHA-256: 832b48edc916e5ff9076ad3f390c7a2a6f83e28ae41590a0e000cee9a2bc6264
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to lure users to malicious content. The presence of multiple external URIs and link farm heuristics strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://aqbnb.com/uploadfile/file/rasoroxuxipidovumoradej.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/0e9bbe224aed9da9edea80ac79b1ad66/bugisakijagopodu.pdf
    • http://jonesfamilygathering.com/clients/2/28/28a2af4908f4fae7f70f8b91082c1e08/File/megepujesoguloj.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2d786b91a4bb1da208c2f79391e225b0/16719722363.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075aad6e7c8c---51372888355.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/63530e6125c845b65b9298089f93e97b/60371821060.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbf89b5422---saroxakewuf.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/4a9c4c01ec3db824bb9116de8dcea7f7/81759301965.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/2cecf306fe3b5c7216f0f9cf069b8d80/muwubud.pdf
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/6e7052ce5902f756d5504bc1eb381402/zivuguxixewekoliwufus.pdf
    • https://vrindaindia.com/php/joseph/uploads/file/fegoluxuvanegekatefi.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac6cbb9fa0.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/64d0bf57ffec1de5a26585a9d5f2ffb0/24130500412.pdf
    • https://alshaabcoop.com/userfiles/file/86711901239.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160982bb68e1cf---gofatetufikixejagow.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcb1bd76df---dozekifogixizowuvozobital.pdf
    • http://arohitourandtravels.com/userfiles/file/31041431299.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/f1a032025702c5998b67acd8ecd102a6/dopajipagazefazatopu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=the+outsiders+questions+and+answers+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_off0000e744.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE744 16792 bytes
font_01_sfnt_off0000ff56.bin
e73b5b3b1e49514b46d33467ff86c28670382083521dd1283a8bf351bafb1ad9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 17028 bytes
font_02_sfnt_off00012bc5.bin
6097fcc4c787a3a744cf1f9ae74503fc06f3b409b90a8543b804b9e2d0c2354a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC5 10844 bytes