Malicious PDF — malware analysis report

Static analysis result for SHA-256 9947d54659b4deeb…

MALICIOUS

PDF

84.7 KB Created: 2021-06-28 19:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 128555e94a5efbf564163e447563d5dd SHA-1: 11637727cd5647f60878dd17246f509a1c7b7441 SHA-256: 9947d54659b4deebe93d39486d6c27c67005aa03334ad624078e7b436df3d5f8
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 that point to compromised WordPress sites and other disposable hosting, functioning as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://synerhu.ru/uplcv?utm_term=ethanol+with+grignard+reagent
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a5b55c5d2---43908366368.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a26d682fada---zanuwebikonajubovanafaru.pdf
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d5c3b79fd---50593158836.pdf
    • http://zamokugrofa.sk/admin/fckeditor/file/26300731453.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/b6e2a27ab8c87a0899841c7e3a8767b1/25396239776.pdf
    • https://peterdegendt.be/file/jitularifesenesanulo.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/rafojowirige.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/72e88c5eb119c04b7fd9b1fdf0f48204/66066941022.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/a73952641698fa7145a5499be12502e2/bimorefokedikaloxuwur.pdf
    • https://yuss.it/file/24582019055.pdf
    • http://karmand24.ir/basefile/ehotel724ir/files/43162879119.pdf
    • http://resortcrimea.com/ckfinder/userfiles/files/xakonozebixomo.pdf
    • http://deepakbatteries.com/uploads/file/pakadamatejatomekibupudu.pdf
    • https://cihangirhotel.com/upload/ckfinder/files/bigekatitoju.pdf
    • http://waltwhitman1964grads.com/clients/6/6c/6c9ae932573016e5ff31759a10dce4b4/File/wodagiduzogadiji.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/71bc0bf52ed14e798ca439311120be6d/55685849924.pdf
    • http://boxethai38.com/upload/file/rixakobipuvojorur.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f816f788f8---51777879703.pdf
    • https://thenavyaindustries.com/ckfinder/userfiles/files/lakaxojuwiku.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070cf55389b3---munologigami.pdf
    • http://bajcsidavidfoto.com/_user/file/71158237492.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e4251837e---72089308904.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/g42jkpp40fq9dvst7f2bbo5ff4/25776498430.pdf
    • http://luvnchrlysenglishtoys.com/clients/861429/File/31944139203.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/61tu78nqmu3nequ114mmgncm44/wiguvifuvelubiwob.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/6km0t9hibk911q0eapg6q8rppr/fikesive.pdf
    • 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_off0000ea40.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA40 16792 bytes
font_01_sfnt_off00010252.bin
8863b686d814dc464ecd21167c2238585142284676e3ac063888d87891b87a00
pdf-font-stream PDF embedded font (sfnt) at offset 0x10252 16724 bytes
font_02_sfnt_off00012dc8.bin
40b94533907c787940dfa3a135c412271132516d5805779b06b5248577c9e832
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC8 10428 bytes