Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ab0fd348960b00…

MALICIOUS

PDF

71.2 KB Created: 2021-10-09 16:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5d02dc02518f9b19163ed1c662762e37 SHA-1: c2e041c898706fef1d952492ea5c38581f1e4adf SHA-256: 92ab0fd348960b00afe110333dffea26730c77ddfc718ae197736420bd460a6c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed for malicious redirection. The presence of embedded JavaScript further suggests potential for exploitation or dynamic content delivery. ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=cite+and+sight PDF link annotation
    • https://noelex22.org/userfiles/file/36393837118.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/mabezifepigunimexitu.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/ee82c65659ba806bb2f2ee7aa7bd8f26/kuwigigaxagevoxevesutoz.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/totabolawetolagaga.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/65432551498.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/goxonibe.pdfIn PDF document text
    • https://www.sacict.or.th/ckfinder/userfiles/files/57429864739.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/kidewizufewix.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/5293932555.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613485f10ef18---47219567624.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/sareruzibimejaxan.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/vokoxanulifebezuzobilu.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/tedipiwoxezigibegosizelak.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/zosegetojixigum.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/86lc8kjl84l5m5k0k4enlh32ov/36745771963.pdfIn PDF document text
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/bomexosa.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/5fb0b1d9dd7560f1d9896d2902b86274/varukiwajevovukifakot.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/gixuj.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/86336199971.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/sowulo.pdfIn PDF document text
    • http://phongkhamthienhoa.vn/images/files/vijulerezomoneledazeputa.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/86641769980.pdfIn PDF document text
    • https://ispartaprefabrik.com/ckfinder/upload/files/texujidelezemi.pdfIn PDF document text
    • 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_off0000b89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB89F 15764 bytes
SHA-256: 22aa835a6759586e6742a8c995e495db9f73e9c059d6a019291a2ed29a91c369
font_01_sfnt_off0000e094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE094 10292 bytes
SHA-256: c24174625510392f7852c8970cc8a153383148b26da2861e9d5fa3acc8c5357d
font_02_sfnt_off0000f781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF781 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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