Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8a91f522f32fd7…

MALICIOUS

PDF

81.3 KB Created: 2021-08-13 05:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: b3d8d4dc73cce207ef9d011e9ca28ff0 SHA-1: 43f08cba2cd475457b5be62b25bc7e65555beebb SHA-256: ea8a91f522f32fd7d2b20e0b2404a378b839c7787e7f4783d7c27103d1f62cc6
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document may also instruct users to open password-protected archives, a common tactic to bypass security filters.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://philabc.ru/uplcv?utm_term=como+comprar+cuenta+premium+minecraft PDF link annotation
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/7b04580fe063e9cb82481fe5cb765b79/8333121785.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/fikutukefibegowolobowut.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/derijituzisijafug.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/26766939216.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210625_183022.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/53032744050.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/4a5efded24563aa3bbe455d98876821e/1653342474.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16279269021043796589.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/83242267135.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e56ad3107e0186ac1d0d07dbc2836def/28748964353.pdfIn PDF document text
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/25386185130.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/vobupak.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610577213c2fa---gapaxikoxotilibifezex.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/66240084525.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/dezugif.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/e2cc662b10ef7e072b70c07d6efb634f/tavowafemulisapudujamip.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607886e3bf24c---rezizuker.pdfIn PDF document text
    • https://superpart.com/files/3452978199.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/17770649603.pdfIn PDF document text
    • https://energooptima.hu/upload/File/3679670813.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/xejaxisunib.pdfIn PDF document text
    • https://eurotechcorp.vn/admin/webroot/upload/image/files/32732475485.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160b227a43fb6b---17255830683.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098461d1bd5a---vopunenegimi.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/dufizumo.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD579 10556 bytes
SHA-256: 7b9b657e2eb671010b3401c22bbab4611b88cc18c0306342c53c11984bb59677
font_01_sfnt_off0000ed84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10596 18544 bytes
SHA-256: e8182d1d1435058952b7a7da4d76b480fa08ea07180bf916dfcb4eb24d62a00f

Open this report in the interactive analyzer, or submit your own file for analysis.