Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d2429e29e48262…

MALICIOUS

PDF

79.9 KB Created: 2021-09-16 02:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4f729f88201e49b6caf175986bc857f SHA-1: c1f9f0b4035a87bed91ba18da787c1a94dcc495f SHA-256: 62d2429e29e48262e2cd5a77c050c912b61c0beb08119ba0f6c77ebd5ea6da14
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a deliberate attempt to obscure the final destination and potentially distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://infrive.ru/uplcv?utm_term=the+last+airbender+2+full+movie+online
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/99520296644.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613178e378bb4---3984155290.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331a2a2a68c---sagadisivedewuvo.pdf
    • https://indianhairtransplant.com/ckfinder/userfiles/files/3670362296.pdf
    • http://hamdannepal.com/userfiles/file/foviraxowifede.pdf
    • http://khlongtoei-nfe.com/library/userfiles/file/mojopelaxedapewiwerezakuf.pdf
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/42712283950.pdf
    • http://hungthanhauto.com/luutru/files/jukivigofuvizufilizizu.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/57a9af38da504e15482840ed1579a268/15840773522.pdf
    • https://studybrilliant.online/app/webroot/img/userfiles/file/fomuwaxisovevikiromijivus.pdf
    • https://businesslife.com/content/files/bonapipuvebo.pdf
    • http://techsystem.gr/data/uploads/ckeditor/files/73565079639.pdf
    • http://zgic.ru/!upload/files/61946436459.pdf
    • https://lifo-sea.com/ckfinder/userfiles/files/diwexanokifu.pdf
    • http://guerrazzi.info/userfiles/files/kivazojumakovebiponu.pdf
    • https://groupunsur4.com/contents/files/fexifusimejagug.pdf
    • http://leinerpakgelatine.com/survey/userfiles/files/55386112191.pdf
    • http://mawaevents.com/uploads/file/solavoremanunom.pdf
    • http://pozitron-s.ru/userfiles/file/52033845932.pdf
    • http://vietnam-intraco.com/webroot/img/files/wonivekujesuwopikiz.pdf
    • http://bindashnews.com/userfiles/file/zobijuripoxujasosesazati.pdf
    • http://ticketsperiodico.com/galeria/files/91343177042.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4a1.bin
fcc8e9689797dfe8e7462bdc7691e0725756c3316cc1e3e14b2ec49129070177		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A1 11008 bytes
font_01_sfnt_off0000ee10.bin
5b837474000834db06f0ea8af7758c6b69eae385b694c9f742a74185998dbf7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 17188 bytes
font_02_sfnt_off00011a07.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A07 16792 bytes

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