Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b5998c54f1fb6a…

MALICIOUS

PDF

75.4 KB Created: 2021-06-11 09:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 29889c517aa780cf4fb12f732c085d86 SHA-1: cb8395ea8655716ee461cf74e4569a5969d7cb71 SHA-256: c7b5998c54f1fb6a5229df60c240f9f53b4aceccc1e31ebc4331228b97a88aea
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites. The document body, though heavily obfuscated, appears to be a lure for cracked software, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the download or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://medvor.ru/uplcv?utm_term=noiseware+plugin+for+photoshop+cc+free+download+crack PDF link annotation
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607af211ab7b0---nebomukunizejevolimej.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/85881344949.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf80732ef5---57854052120.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071401268fde---mufofutiwar.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/mudologusopokatut.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ls8guajbrjfvqji3ofcttpi225/xisajuvorejolovisif.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609218e541d73---78936162462.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e426cc0960---ganivutezimibojaxaju.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960bf207ad3---xejurotanabewelenudu.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/97713679364.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607edfd9c63a3---noxojepa.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3d3751403---wedujanizutamokik.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/xudufakabefimuz.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e82c535c8b---vilavotusetow.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/gigaxinina.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/dm4fb6ule1ofjij81t3tvkk3at/3403915540.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/81b713379f6ea7a0b0d2dd6b8aeecdb0/naropokudasire.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/7f1f4981ad7ba5dd076bedc17f869584/48064623938.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afd4625945---68332666783.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA05 5544 bytes
SHA-256: 4dc12027303168a32306b3cb8275d29bdd6425214ac8c58534dfbe25cb871529
font_01_sfnt_off0000fcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF4 10376 bytes
SHA-256: aa88424308c5e7b0817b0d37611aa393dcf3109a4d3b22751bd6fa3635538730

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