Malicious PDF — malware analysis report

Static analysis result for SHA-256 feaed13b7bb645ca…

MALICIOUS

PDF

81.1 KB Created: 2021-09-19 22:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b4866fd882239f41789bde44a81e71c8 SHA-1: ba684cd1d600ab983ae434151137844f0f828a6a SHA-256: feaed13b7bb645ca6fd2e5a48bd5976399ece2f49797ace5ac7b7635f3ba07ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to external websites, many of which are hosted on disposable domains or compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to trick users into visiting these sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pistant.ru/uplcv?utm_term=new+tab+chrome+hotkey PDF link annotation
    • http://seattledesis.com/fckeditor/file/vuripoteretutalire.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/26895944617.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/tuzinowaseminotetim.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/70294880329.pdfIn PDF document text
    • https://trystsalonri.com/images/file/doxamusa.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/77306225943.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/5083938528.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/42827613815.pdfIn PDF document text
    • http://myoffice2561.sesao33.net/UserFiles/File/19105029326.pdfIn PDF document text
    • https://protraderin.com/userfiles/file/bigunibefexaxutu.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/26053gombin98i8pt9lubqbas3/36437379344.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/jusexuxerixapegexaz.pdfIn PDF document text
    • http://modero.vn/upload/files/tudibazosewek.pdfIn PDF document text
    • https://hanoihome.net/img_duhoc/files/vidute.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/fa24b2f69ab13d6d7832d83fa8b97103/53036592339.pdfIn PDF document text
    • http://perfect-aerosol.eu/userfiles/file/53565076314.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/8352746620.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/wefujenepomorew.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613188521c3f8---rusiwipuba.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/garuxokozexu.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/nepaxefijufebuvi.pdfIn PDF document text
    • https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/22196886752.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161416cb8baae1---jimebofuwogelux.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_off0000d7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 10492 bytes
SHA-256: a8c3539b0af315b4f3077b2399efa82324ce931169a8eb2a1041a740a4db1da7
font_02_sfnt_off000107d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D1 18412 bytes
SHA-256: ec5b90bfe0d728d436495b2a3f7dc6250358f4ab6506d05eacd4fa5655e2a492

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