Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e4be5ad32de937…

MALICIOUS

PDF

87.3 KB Created: 2021-06-29 03:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83cc686c4be7b77ea572bc89b6bd1728 SHA-1: 45d4aca7c5812f997a86d1083a379ca4c9d23033 SHA-256: 00e4be5ad32de93750ff56ed08657c09c003d1ea318a94496701b33a0609073a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The presence of external URI links and link farms on disposable hosting indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pistant.ru/uplcv?utm_term=onenote+merge+cells
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608785c84af1a---93303765909.pdf
    • http://hsi-international.com/ckfinder/userfiles/files/vugajeligovipikinuji.pdf
    • http://hzdsbg.com/uploadfile/1623822683.pdf
    • http://kompletucetnictvi.cz/files/file/86128420969.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16082149f8f43b---netesebibagajupufobemowu.pdf
    • http://katachizu.com/img/news/files/19244674064.pdf
    • http://roocenter.ru/upload/file/10239587386.pdf
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/jogivozizexonowugerop.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/e45a31571b688885a629646508ce1c8a/sojimofalafaze.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607841727db05---zadimavevuget.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861cce59c4a---lebevikere.pdf
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb4ff4244a---75976748102.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcdaec2cb7---taxogejuwitalot.pdf
    • http://rallyteamwalraven.nl/file/67593778455.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/56f2a78a5d0ed8909141d7719ad674cc/razosamazuvademikon.pdf
    • https://akapacha.com/userfiles/file/20302961835.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876f6eaec33---9809685337.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/a766aa93bbf0386b70e36551de322ff8/patexuvojusegasuxeresoduk.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609553d74e376---jetujagizodonirokeg.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c671a9e434---23123752658.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16084144d0b3ae---xomokadoz.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e365ed1026---lekedetalatafiro.pdf
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/51744273041.pdf
    • https://lotteppta.com/beta/assets/file/48248920940.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_off0000f10e.bin
f83e37186a912b6f060070a718538bb425ebd51e240dbd60e725db081e312712
pdf-font-stream PDF embedded font (sfnt) at offset 0xF10E 10344 bytes
font_01_sfnt_off00010869.bin
ee78a48c21bbdd1befe8eda1d4fe1726031e59081320721d9be7732929eb07ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x10869 17656 bytes
font_02_sfnt_off00013693.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13693 16792 bytes