Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef6b871470473c6…

MALICIOUS

PDF

63.7 KB Created: 2021-07-30 05:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 5f393ef1ff54e717d592b21d20c6121a SHA-1: 2b60c0ea1c876a021d0450d634afb46928d96fa1 SHA-256: eef6b871470473c6e5691072cf3024cbf1785f188e0095724a0b27ff412135a4
154 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm intended to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of these links and the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9193

Heuristics 5

  • 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
  • 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://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/op1lt30jj1e8nmunv01m5o5jv5/gawutibobal.pdf In PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/35ff81e96a5e2ac228284a945cad9622/jinivifonavefok.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/91931220967.pdfIn PDF document text
    • http://jtipartner.com/ckfinder/userfiles/files/77725881197.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/50130109917.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4a99c7149---18374538326.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/49869062083.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/96402991781.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160f80f37d46d0---38272450724.pdfIn PDF document text
    • http://chinalabware.es/d/files/90179323268.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/bitixomituboduwovol.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/wuxufolukaxizamalulatal.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/loguvi.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/kewipunuwigidosasavo.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/12604457845.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/zebezuvakawado.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/beguzuxivozovitefifo.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/1642f535c2037b3f8a1b1988a07c00c4/20520025213.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/kuvedi.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbf4d568e2---97053210118.pdfIn PDF document text
    • http://teplospectr.ru/images/files/32578792746.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/85367e134e90e5292dfcf78ac10fcbd5/52376241877.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/68687742590.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/77394848080.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+write+a+french+letter+of+motivationPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1