Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67e6514c141f063…

MALICIOUS

PDF

93.6 KB Created: 2021-06-26 01:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c457a9b9750bd2ad5aba41b21affeeaf SHA-1: 47eb4076962d63f69b1d4b4c2f3b2d5508a74dd1 SHA-256: b67e6514c141f0634424085696b2c9e249749ebe7f024e356340e2a9d0ad8413
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, many of which host other PDF files. This suggests a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758cef693b7---suluwamepagonirikerite.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/8892dbe2c388c9512d01658995339699/zigatasemedadavinun.pdf
    • http://xaydungphongphu.com/uploads/files/ludokolo.pdf
    • https://balajitutorial.com/admin/userfiles/file/warovis.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/l7iqu32670cqi66mshqni81n1m/90565021648.pdf
    • https://samowar.ch/upload/file/83621079931.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/jf335i6rf6gstqjqvfrsg1plds/53877706686.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/3551b54c4070d70fa89039aecc65010d/81987738851.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/7edd89c357bbf9b3004f6bc198b91883/zatupovewizalefeforese.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a408ed54689---23566565644.pdf
    • https://tipresentoio.it/images/file/21794037730.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/c079e33a2c980f54a3d59088bcda458f/zunatiwuxa.pdf
    • https://evergreencans.com/userfiles/file/11610333870.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/cbefa4d55f4f2adeac0c307e2299d68d/5812576575.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/83430879fbe0ef708be7d85896fa6e9d/76643651330.pdf
    • https://an-professional.ru/img/files/file/numovapevawarawigewu.pdf
    • http://automotiveenergy.cz/userfiles/file/70939106527.pdf
    • https://red-adlay.com/upload/files/74891120580.pdf
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/80875269295.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/411f23dda04a77e59012ca12b3de42e3/76776193748.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/2d10fda0e5d77f1228aa8f5873f604fa/liforawad.pdf
    • http://lifecare4all.com/upload/files/29949441295.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2130a1354---19537513688.pdf
    • http://massarentearchitettura.com/userfiles/files/77443411186.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/828ab507b3816b8bf967f26c1f2d9035/22283297836.pdf
    • http://tikatalog.sk/_files/file/tufizutuvuxebomux.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=chemistry+june+2014+regents+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010687.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10687 16792 bytes
font_01_sfnt_off00011e99.bin
305dcbc80f70ecfd42b0109031d6b0e0232d2b9c74a6d5ae3228c7a78974ad1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E99 18056 bytes
font_02_sfnt_off00014e86.bin
f8c8df5059dd72820640d8a3625c7c462726340cb5cabae2d15ef7f32167eb8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x14E86 11220 bytes