Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2ea8cb9a14a148…

MALICIOUS

PDF

93.0 KB Created: 2021-07-15 10:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9120dc461a1611530bba4eaa3541fc92 SHA-1: 32da67c11a4de2ee927fe9a125ec71e28f764c81 SHA-256: bb2ea8cb9a14a148c6f368daa0bd9bef7841be76834d550d402d4279f10033fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories and disposable hosting sites. The primary purpose appears to be directing users to potentially malicious content hosted on these external sites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 https://garglob.ru/uplcv?utm_term=forty+three+pounds
    • http://hzdsbg.com/uploadfile/1621081522.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe7fe178ee---59847218478.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbd7d09f1e---99139001753.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b51fe04b4d---94519102030.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/65554i473k25gk0h1ghakimpl3/32952261350.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c85bcead8f---tafavosoribegova.pdf
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dimakogaburowepoworiweraf.pdf
    • http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/83507727677.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/hjjf6b4ccbekhk9e1tsjdthnfo/mupopatejowapifibotig.pdf
    • http://erex.hu/upload/file/gapatusaxodikulegilerazo.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa88d98deb---giwupimugofumipegula.pdf
    • https://heritagecambodiatravel.com/userfiles/file/tolifezijigabara.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/0cd62f21ef4db6e44880fbcd237ae03e/32419002666.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d91caee3e6---velujavujisogoxubonote.pdf
    • http://wallsfamilyreunion.com/clients/876683/File/wiwegonapazaxojulujap.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/92l2ee9smhldd6n7fg0v6oajfr/78883194614.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/94ca03389b37a2880df8e3ebf9555955/lilezipen.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a07e11627---48751598811.pdf
    • http://centronegozi.com/public/81451669588.pdf
    • https://a2designbg.com/userfiles/file/99289478543.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/b44ece379131099fce82e1395aa9f717/nutaxa.pdf
    • https://ises.ca/phpsites/vertical_living/uploads/file/xusudetipamanet.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/7f040a4aee7aa9f5d3380821e2098a29/zeluwivim.pdf
    • http://aldo-ins.com/userfiles/file/xelowodaro.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_off00010955.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10955 16792 bytes
font_01_sfnt_off0001216c.bin
6954def05b2829688205e0fc295f57ac31bd43a135b026edd8e2a5b501ec4057
pdf-font-stream PDF embedded font (sfnt) at offset 0x1216C 10380 bytes
font_02_sfnt_off000138da.bin
1531b283e52a0e8644718cb2b796b0d9e3c06b0b11585787b635bdcccb0d20fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x138DA 17624 bytes