Malicious PDF — malware analysis report

Static analysis result for SHA-256 a666f10f25eb7b07…

MALICIOUS

PDF

85.3 KB Created: 2021-09-21 17:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0f36b3ee79b57b747759675ffe359a06 SHA-1: 21ae9f71fd196e2919b0c9dd93281ed02ccf2e93 SHA-256: a666f10f25eb7b07038514841d0c74fd4fad9aa69c8ce86a7841bf19e13e8977
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS upload directories, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://novo-foto.ru/ckfinder/userfiles/files/11989801126.pdf In PDF document text
    • https://nk-sostanj.si/files/file/66888658050.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/dusarinivoluw.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/zuvegefijuzol.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/wubofososubasomis.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/79595017533.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c9ac81a4a---rukovanojonemavobag.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/88920069363.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/miperazukowevivokirobewox.pdfIn PDF document text
    • http://www.painters-restaurant.com/userfiles/file/nidubiloborakotitewizidut.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/jatupaponidus.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/2c7uh2l41434hmnima7sfmkcb3/barufakinukalawe.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/vomitezoluxixebotu.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/6416897571.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210913_155156.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/jileteluxoxegoruwu.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/55d904170803ba2566dcc9004212d941/4088100209.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/pobotosuwabinapomap.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/totoxidi.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138384171c87---58900640157.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/bakoferivutodivu.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/wimiwemijekuwefitesijizep.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/nozopi.pdfIn PDF document text
    • http://maudchristan.nl/ckfinder/userfiles/files/zuvadipaboxubo.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131aacb05fb9---58430410858.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=code+shindo+life+robloxPDF 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_off0000e76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76D 18408 bytes
SHA-256: 00043ca965861ab333e6e3a78b20bf4858e4e96bd46f8e6dad238b1c3b3d555c
font_01_sfnt_off00011779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11779 10464 bytes
SHA-256: 40c2ebb2585fe5a3600545e4e5df3d9f8bb71cc7bd1435b8e11b2263f7d90b38
font_02_sfnt_off00012f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.