Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c96a767c2cf01a…

MALICIOUS

PDF

70.7 KB Created: 2021-09-03 11:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 7b924f233726b7643020e15bbaa46899 SHA-1: b7d080118c8dd160494137df9a9b137ee885ef71 SHA-256: 24c96a767c2cf01a67896da9a168ec78ff27c536ed9dbc131b5ddf87f29427f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

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://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18a502736f---8381121730.pdf In PDF document text
    • http://paneldeconsos.com/userfiles/file/fosubomedobowapowo.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd962a9a78---60490414578.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/78511453526.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/ditajumogo.pdfIn PDF document text
    • http://danangsculpture.com/uploads/image/files/furevijidivabajepeku.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/d15c38c010d34a994f23fd9558b17ec8/rurerepirezezagukiwofug.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/17545711635.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/f17d1c7678c2e2830b437b954e58a852/41263275426.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/ea1dfae8b48f841d5e8cda416c9101fb/paguramalu.pdfIn PDF document text
    • https://manhremhoangvan.vn/wp-content/uploads/files/31525000368.pdfIn PDF document text
    • http://air-ned.com/uploads/files/numewizixajozogoboveroxi.pdfIn PDF document text
    • http://gujaratbusinesspages.com/userfiles/file/zedaluw.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/23216671362.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/17664706402.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6ff34eb2eb42f5b6545127906fd7ce1a/xezimeditefep.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39ca8380fc---58933069161.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/58867400394.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/6439526017.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/subikiwatiboxej.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/ronosexixonoxumagur.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/d3170fe6cbdb65d2437139a8da7826d0/42483575693.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/gozegatevajex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=remove+background+colour+from+pdf+onlinePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAA 17020 bytes
SHA-256: 24727b59227c5adaa488a58bf66aace2b5189521c54dc8bc6ce8d76730e84cb2
font_01_sfnt_off0000fa62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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