Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5012f4d4f0c5e8…

MALICIOUS

PDF

92.4 KB Created: 2021-06-30 21:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc5bd6085c11699c6806f44d60c4814c SHA-1: 87189eabf764c251c436c1d97b6f52d412c09267 SHA-256: 0f5012f4d4f0c5e83538b034b702ec8f0ff6a3ca44ceb869da95c9b2a299ce64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. No scripts were extracted, but the presence of numerous external URIs indicates a strong likelihood of redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crysiq.ru/uplcv?utm_term=armies+of+middle+earth+pdf
    • http://yilip.net/userData/board/file/66683874616.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609070c4811da---xorovuraxajijik.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/mrp31t361hkvt92drv413fc60d/sarusupo.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/3922310901.pdf
    • http://interreg-ipa-husrb.com/downloads/fazinaxilasofiloxuzof.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/17132d88eb04547d9d9018b3550d5ccf/betopewuna.pdf
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/depenenonuvalexeporuxubu.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a52482be7e0735f19e7a4298333ea1ae/fogogetedazavasovoravi.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/a196df7eb69a9f833ed5e52ddc1c5412/vutimosogetilabigamujuv.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bef6d69cf93---towagikisanosuxupunawem.pdf
    • https://werbemittelag.ch/upload/file/76180200780.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e8fbc6fb8---79989284367.pdf
    • https://ahreco.com/uploads/news_file/nimozevudeguw.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/0c23n1o7cur7aoe14qeas6f9jd/fasikenuxo.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160747e26f0cd4---jugovovigipekaru.pdf
    • http://bygreenpure.com/userfiles/file/wopoduworola.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160866b6a88804---30852418091.pdf
    • http://cosyromania.com/media/file/59306171202.pdf
    • http://birnagarcollege.in/userfiles/file/samuvaradozekelukegasukut.pdf
    • https://accuratesearch.com/userfiles/file/23049286868.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607940407170e---pukuzidowupajifuvem.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/n051llpu1fqs01tt1f8ojk9n24/didekufexiluwoxubinedad.pdf
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/nanoregata.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a277cab8c87---8105834300.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_off000106cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x106CD 16792 bytes
font_01_sfnt_off00011ee4.bin
72a59a24cb4b47ef528d55797ce595dd147d5f010249a7b0d9537bcf19f722a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE4 10640 bytes
font_02_sfnt_off0001373b.bin
1979a72bf61f20f930a0ab4c4383c3c51d8595886886b6720d8c1b4b72e24872
pdf-font-stream PDF embedded font (sfnt) at offset 0x1373B 17304 bytes