Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6da694b61abf5c…

MALICIOUS

PDF

82.2 KB Created: 2021-09-02 04:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1024411c62dab20cfc090dbed8a18d60 SHA-1: af2d83855f179358fe83375d82596572b4381f87 SHA-256: 6c6da694b61abf5c71bc55be32f871215e8f4bdc4b6ceca910df65d4d7f82f53
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to exploit users through deceptive redirection, likely for phishing or 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://hanurichurch.org/ckfinder/userfiles/files/21793711646.pdf In PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/guzunataz.pdfIn PDF document text
    • http://straps.by/ckfinder/userfiles/files/35802995115.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/puzelodipuposidixobinef.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/28305113466.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b23879e976---bagezajamisik.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/49814667846.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/49027949238.pdfIn PDF document text
    • http://princeton1959.com/clients/863834/File/13751365793.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/kazaxupajutitukaloberew.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/47800741103.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/pipujezamusopu.pdfIn PDF document text
    • http://inistor.com/ufiles/files/wevasusokinule.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e83cc41672c---voluserawuguzopuzoxufewa.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/b64c20c4cba74330b97400fbd04610c4/felavejofudexisaguwes.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073a3c23a90f---4777272916.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/migonuj.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/fubuxasuxijep.pdfIn PDF document text
    • https://vvpta-irvine.org/userfiles/file/muwagamevi.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/pebopikopimejusizi.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/b4b7fa5aa7c5ef6d61d968528b100def/33358630600.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/42848504085.pdfIn PDF document text
    • https://rumusjitu.com/contents//files/84270248710.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=is+spousal+support+tax+deductiblePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F0 10696 bytes
SHA-256: 3f3e70072a7c36d0c0ae4f0e997abfaf1249b578935b6e0fe1d1a181e08875a7
font_01_sfnt_off0000f267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 18956 bytes
SHA-256: 616685fc5d9d287dc3ae78e020658f2ed9eb1833301c466277612cfddc13bdbe
font_02_sfnt_off00012371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12371 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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