Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c192ea406b978ce…

MALICIOUS

PDF

70.5 KB Created: 2021-09-06 20:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0173268d51927baf631a284372bcb8c8 SHA-1: f4743c122f28c38d8d9793205b0b0430c62502a7 SHA-256: 3c192ea406b978cea6f1fa52936ab6c10b216c161b7fffbaec6c5a0439384e7e
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It functions as a link farm, containing numerous URLs pointing to compromised or disposable hosting domains. The presence of multiple links on potentially untrusted domains suggests an attempt to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://beldaoyun.com/calisma2/files/uploads/21237036984.pdf In PDF document text
    • https://nestaerospace.com/uploads/file/vavowelefazi.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c92c845cd0---9125912686.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/fce0a8c58ea9c7a52988ee9194f1da03/19568736940.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/44497144273.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/mnsef7eg2btbsgbc9m3h075q63/gapoku.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/temasemunafavujomugi.pdfIn PDF document text
    • https://premium-house.uz/images/file/4682848490.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/petuzekiguluvo.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16102cebbed70d---32515856659.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/61144421353.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/9d2a2c2537f5fd76243f90ccc827fcf3/pifojowukuxivadodugojoxe.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/56947109150.pdfIn PDF document text
    • http://wghsclassof69reunion.com/clients/b/b3/b33699c65747f61a54cd06c2fab73d22/File/75264217292.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c49d51d2d---97610179911.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/8a0f399027d15c26b942c9fd35cd4072/karipolavumajosisepelom.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/f0r004va5qd906id984nj7pd34/patazi.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/tivevusalav.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b54f63d6713e91a804d46fc994bb7ae4/36952291597.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e0bd7fed4---54708409965.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/91014070394.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/54347529020.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/duliwoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=epsilon+delta+definition+of+a+limit+pdfPDF 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_off0000b4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4EC 15240 bytes
SHA-256: 787b0419d9f29273f535bc0d14dd666bda17d517a098d076dcc6df03800479f4
font_01_sfnt_off0000dbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF414 10540 bytes
SHA-256: dda0eba522530cbe14258f7d2d0b9ef8b66cf1d6f19cdb5611866303de0a10e9

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