Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf5ad17c3f7f849d…

MALICIOUS

PDF

84.7 KB Created: 2021-06-26 01:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39b0b5f4e3a1e80e068de3d0596cffa4 SHA-1: dc29fad33a84d3f337dd35f6862069e57c8d79d7 SHA-256: bf5ad17c3f7f849d0d3927d468c29f032404012b74c009f9b73798321550fd3f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URI links and link farm patterns indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://queure.ru/uplcv?utm_term=university+of+louisville+basketball+game
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072239b360d8---26085409024.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160973b44bdbef---46114198735.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8198f07c6a---55668562790.pdf
    • https://vydavatelstvoklett.sk/userfiles/file/19838406908.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/c904f9b3dbad5c2f0edaf22b512a0547/dumezitejipoguliz.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/16226013961.pdf
    • http://vankouwenenmastop.nl/UserFiles/file/71870337702.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607810bd280b4---56321683837.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9b9c7f51b---zoviwuruvowa.pdf
    • http://vietkinggroup.com/uploads/userfiles/file/43918832514.pdf
    • http://innotec-industrie.be/userfiles/file/wokozevikowup.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1f3a3da38---wamizowe.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609101a4d4709---49706878587.pdf
    • https://syteq-pro.com/userfiles/file/35288302547.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2af5554156---pisokogepaz.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6dccc85b29---63618550313.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/bd9eefc23f5cf4ad1151ec944425908c/duwikukulales.pdf
    • http://galeriejacqueselbaz.com/userfiles/file/runelobinewefigerafunupu.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16095f82512fbc---53678675218.pdf
    • https://yellowstonewildlife.com/20992366591.pdf
    • https://alakharia.com/public_html/userfiles/file/dumej.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/11be2a6b8a9729eb4abdc363ad4ac7d1/57676864387.pdf
    • http://tourister.kr/userfiles/file/kuraliboz.pdf
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/38957186728.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_off0000e720.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE720 16792 bytes
font_01_sfnt_off0000ff37.bin
f2930db588f83d9f505735320d2e9280ba79040cdb226ac83a822626e223dc9b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF37 11076 bytes
font_02_sfnt_off0001191d.bin
71c282f8d8385f0128b69e70c65e7f20f851feeee882fbbbeef0e34c2c55296f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1191D 16848 bytes