Malicious PDF — malware analysis report

Static analysis result for SHA-256 048fb0037ad3c6b2…

MALICIOUS

PDF

64.3 KB Created: 2021-05-20 04:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: befb3e2c3a01e099b2c3819c7e2d9af0 SHA-1: 3be52f61a3b6dc13b1a646143f95f04d24bdf1c6 SHA-256: 048fb0037ad3c6b23fbcc4d3246ae745eda106fd01b27e3bd48376769248f8c3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8702

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
  • 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
  • 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://synerhu.ru/uplcv?utm_term=o%2527level+result+release+2020+brunei
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/4dee690260f524d332b93abc33a752de/81103782934.pdf
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/xefazazaluma.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac22a171e4---katevalesapogev.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/4c87bbbb3614a0c77d15ce780b67b521/murulupavatejetevinejese.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/a3bf5aa12d3d398e55ae3668761bb05f/xewejemebaso.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/cd7f3fdffde5231721c369857d3c6f93/jofewesixawiladunaja.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/gn0ripjam3tvtrotc139b1ghk4/giked.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eee6744eed---kidararupalujujamaxe.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160728f54b5f98---57094297833.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/tqrf80fjlj36nu812bkbrid2j4/58866469760.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4a461dc19---merapofogu.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ec52059f7---7079932332.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909171b3db0---51193974348.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079990d00fb0---72692083716.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160749ac5ee2d0---69604624507.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/b8fbc656ea97eb2b4de8bc314914c9c8/65764853913.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/temm8qlatt5vbq6ejgpbj07rke/mejimadeta.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e295.bin
37bf7037307a8e30fc748bdd0a3bffc580a5bc00dd9f6c95c766bb5bf67fc5a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE295 5212 bytes

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