Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d07c1d68d13e283…

MALICIOUS

PDF

76.9 KB Created: 2021-08-01 06:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c193e9bb26b93878a020ec0aea248d5 SHA-1: a9116115a7022d215ab5004be7a435b2d2311b86 SHA-256: 7d07c1d68d13e283ea69ce4254c7ee49704857d2b7d08171d5206ec189ab0ae7
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous external URIs and is structured as a link farm, with many links pointing to compromised CMS upload storage. The primary attack pattern appears to be directing users to potentially malicious websites, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://medvor.ru/uplcv?utm_term=jeevan+saral+maturity+calculator+in+hindi
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607265051629c---58208864867.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160da09daceaea---pugefovopeponeruximi.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/770831b710e893bf2f604449acf34909/penadifur.pdf
    • http://daiduongmetal.com/uploads/ckfinder/files/gajakikisemusevowotapope.pdf
    • https://noihoithanhtuan.com/media/ftp/file/48846174462.pdf
    • http://enjoy.sk/editor_uploads/system/files/riwumule.pdf
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39455045793.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1609405da98642---45369297644.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/fh4ldq8fbkdotupqvonrev1oht/10173509001.pdf
    • http://happy-travel089.com/CKEdit/upload/files/24428085217.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743b07b3285---7898524965.pdf
    • http://houstontca.org/Content/uploads/files/85691942930.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092784f701c0---12441234560.pdf
    • http://obchodsezlatem.cz/upload/files/52557607648.pdf
    • https://coonvalleycc.com/userfiles/file/luduxeteziwimu.pdf
    • http://pwr-tech.ru/userfiles/file/2373867008.pdf
    • http://sacoorhealth.pt/site/upload/file/76274124954.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0dd09439d---gajegi.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/8df9e07de60e6f764420eb9f8d05687f/pitotofu.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd975c72092---88463949388.pdf
    • http://adice-area.com/pictures/files/35509087699.pdf
    • http://eurogeographyjournal.eu/admin/fckfiles/file/pajerijaxagitejar.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04a7def660---60657847765.pdf
    • http://1night2day.com/ckupload/files/xokugivifamoxim.pdf
    • https://markyatirim.com/resimler/files/xipelefijedubodukari.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_off0000c602.bin
12046e7870873bf6a09dcdb2a6d8efea1eadd9b6e8943ea8c1cf41f708008e39
pdf-font-stream PDF embedded font (sfnt) at offset 0xC602 10904 bytes
font_01_sfnt_off0000df20.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF20 16792 bytes
font_02_sfnt_off0000f732.bin
34c92a31fdd30bef7c8e842347aabd7a3e561e6708b3eea4fbe17cde603238d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF732 16936 bytes