Malicious PDF — malware analysis report

Static analysis result for SHA-256 8449666f56d96bf6…

MALICIOUS

PDF

76.8 KB Created: 2021-09-05 16:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f8599af87499cfa0b396e68e4ec15390 SHA-1: fb224756f265bfbd66ed2f8dced7e6b574172d5f SHA-256: 8449666f56d96bf62814b19f46289f396ee50cfe2aaa9309b9b52d2995502465
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs hosted on compromised WordPress sites and disposable domains. The primary goal appears to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://nomylo.ru/uplcv?utm_term=renault+scenic+2015+manual+pdf PDF link annotation
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d03453a5d4---53550970330.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/43858672226.pdfIn PDF document text
    • http://imi.vc/upload/files/57929117391.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/suminilodumupobezaxutawib.pdfIn PDF document text
    • http://drive4smilesquebec.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/42431196654.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608906acb532f---jixotoxa.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/42197759116.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/3525895753.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/2432307438.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/f6c35476ae0c747cb52c31edfbde850d/10890504739.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1b106e499---xapafexejozujitut.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607916c8c8646---50108723953.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/64731691979.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16074c16c00d88---girirezevadogakag.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/patovitexesuxelumote.pdfIn PDF document text
    • http://apsons.eu/files/file/61452287003.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/b3937baf37e94d068376e5a780cda5d5/59367073645.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/42678007494.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/c1536804f37741fa58babc447ecbc9dc/mirotobalerozesigip.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/kubojidemubizifaluke.pdfIn PDF document text
    • http://jkohut.pl/file/vigasizidulotata.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/16328109375.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/madodumi.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/tamunazew.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_off0000c468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC468 11136 bytes
SHA-256: 4f4ac67bb912c69b991e5229f8724af9cff6d41310619d1cd727bd9d90657f02
font_01_sfnt_off0000de82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE82 18212 bytes
SHA-256: aa3209d8cd78e986e6718b5f828fde19410b2c41613d2a83f8b1558294c2f9db
font_02_sfnt_off00010d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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