Malicious PDF — malware analysis report

Static analysis result for SHA-256 863f242df4a0d5bb…

MALICIOUS

PDF

116.6 KB Created: 2021-06-11 21:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8540797a83c752ddb7513369a06e969c SHA-1: 31f205321950ebbdf25bae1308ea601039dbe481 SHA-256: 863f242df4a0d5bb0598623c688b980e929ad9954c6373059c19e212c0342ca2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to compromised WordPress sites, suggesting a link farm designed to distribute malicious files. The document body, though heavily obfuscated, contains a string that appears to be a lure for a movie download, aligning with phishing tactics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pixomot.ru/uplcv?utm_term=veer+zaara+full+movie+in+hd PDF link annotation
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/bee316e3ab5eb51485ae747cb15b301c/57600811326.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/21432961148.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609e80bbae1ef---74146754019.pdfIn PDF document text
    • https://marosme.ro/hirek/file/16104675583.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b453d4769ce---juxonafirizunuwoman.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/10003199728.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071258c44837---31277295153.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9904d38455cb27a852c972294336d146/94315492279.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c8d038df---77659697557.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160badb6781fd8---fapowaj.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160a2747d59d15---kegorojo.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076d88bb56ee---nanikufeborojizibobev.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ce58c3bbc---noluxagipuleburevela.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/rudivujolulipulevibir.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/44105723159.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/jotezu.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdca6538a0---64411488771.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off00017733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17733 5044 bytes
SHA-256: fb2fe14b06427b841638e32867826afbf22b475bf35f2766196dc76f99ad3202
font_01_sfnt_off00018846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18846 11688 bytes
SHA-256: 3e76d8b5f19964035aedea704ae7d4eaa2cf9ab21e237bc8509c1b6cffa1ddc4
font_02_sfnt_off0001af93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF93 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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