Malicious PDF — malware analysis report

Static analysis result for SHA-256 f562f612b42d9d2f…

MALICIOUS

PDF

92.6 KB Created: 2021-09-13 11:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: be6c1b4b035a9b0a707b4930951b5a86 SHA-1: 3da6edbee36dc718ea798c54fd0c9dde4c77a09c SHA-256: f562f612b42d9d2fe21d9066caba92bc2c6076bfdafe45bcfa7be0d08dc07158
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs pointing to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lead users to further malicious content or downloads. The presence of a link farm on disposable hosting further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9629

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://jiab.net/userData/board/file/fakiputusewanuvebedazev.pdf In PDF document text
    • http://webspace.mysdam.net/images/newsletter/files/setim.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a2b9385e0---rasode.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/48040883865.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/43227424417.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/gomalep.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/38067771614.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/gimejejuvijaz.pdfIn PDF document text
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/35140278202.pdfIn PDF document text
    • https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/52479076566.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/bilowuv.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/kitejuxojuzitegu.pdfIn PDF document text
    • http://tonghuichem.com/upload/files/jajewilavuro.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16131587685709---xarukatuzatosogofag.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369dceabbb6---sejamivonuju.pdfIn PDF document text
    • https://komunalno.vrgorac.hr/files/jusubuwukudabomilem.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/88403024113.pdfIn PDF document text
    • http://medi-sen.com/files/files/28636681503.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/42379881233.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/xekirisaxizeneked.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/ef0ee4514d14a1bf20b982d81d95575d/ladosonefax.pdfIn PDF document text
    • http://eventechsite.com/files/files/87264251098.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/56374301404.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/xejoritebubalaniroluxuli.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/viloxexotesa.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613388fc2fdab---risilemog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=bio+decoration+copy+and+pastePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C3 10628 bytes
SHA-256: 1a270c1a01aad90fc62f5372029b13ef561cd169edd03874523be68e4debf752
font_01_sfnt_off0000ec3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3A 16292 bytes
SHA-256: 23340d8a4026dccfd804f95dcaef7a58c8b3adaed3b2ed881b61a27364f77d71
font_02_sfnt_off00010263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10263 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_03_sfnt_off00010aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000122ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FF 25468 bytes
SHA-256: 2aacb97f66bc4f9320537492360953a035a7fc105916d261c65ddba7896fe81c

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