Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fe926af1e2f865…

MALICIOUS

PDF

83.0 KB Created: 2021-07-15 21:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a751a1be9155bb56dd8681e1684ffdce SHA-1: a85f7be65a0a7a6ca657f772afbcf07c04c27af6 SHA-256: 00fe926af1e2f865b992896dee7191122d1682fa86b75486d60eb3740799bb0b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://huntic.ru/uplcv?utm_term=our+pasts+class+6+pdf PDF link annotation
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/gagakepigalo.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b933370a043---jidopewizewavagud.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/0d218b2ab6cb2ad58315633ffd10cbd2/2432305986.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/7735071468.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/jirewam.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/cd147f27b9d5fb240b358b0be4c03660/72162940669.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/ponegorawuwuxeni.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/raran.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073928a69a31---34139872117.pdfIn PDF document text
    • http://grimastone.ru/files/30134643889.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/40584450267.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/661e12eb8ba2c81dd17d65661c2fd11a/wilojexenemunomeze.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/2kta0rq49lqu0j4dnu8r02e7d3/68844236706.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/19217150287.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/robezi.pdfIn PDF document text
    • https://norservis.com/files/files/34352027105.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/26367472712.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/d3o6b52ocvupv3aijqvu57eeo5/sujesopezetotu.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f72ec457d3---98120053146.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/db94b1f8bf043178b08b53529ca97bfa/37359607565.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/tibini.pdfIn PDF document text
    • https://ikima.fr/uploads/file/27188203068.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/7c2460c421cc1c144717237dc48e4d96/87147872915.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_off0000e332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE332 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB44 16980 bytes
SHA-256: 83e1a4f1d8d0697e48475b1d1b7fe0855ccc61fc2cfe2002fa82d89411ae0e54
font_02_sfnt_off00012737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12737 10460 bytes
SHA-256: ee0cc2c20f13effc0e0bba871ce9d8613563305f72e971bcce439f0120db8c8b

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