Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f73d75032d86b7…

MALICIOUS

PDF

84.1 KB Created: 2021-08-16 17:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9ac92acebcd6cd3aa06bd52503eb70ff SHA-1: c54a65e143332ace0c1d7d35e3e622befa1903d9 SHA-256: 72f73d75032d86b716722ed6e6da76e88891bfa7ed5c3bad3e6f2c84958cb7ba
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads. The presence of a link farm on disposable hosting and compromised CMS uploads further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://pistant.ru/uplcv?utm_term=how+to+get+free+robux+2020+codes+june PDF link annotation
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/12unsd9q96fqqq76dlfvsjqvr0/suvozegamodoxoguxipo.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/43136104536.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16076de46d6d98---jefirevizorokumoxikizavam.pdfIn PDF document text
    • https://masukpt1.com/contents//files/debijutogunepe.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/fpu51494g3hpq4de066ka4nqh7/37565839342.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/lh6dmq33q0lla60kulo43fgf77/bekefomojejinuvex.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/82930073924.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/652167ed5e9805afba960808423f914b/7246043815.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/i3thu735acckp1o4u1srop9i9g/29651189235.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/ebeaf58e7891459114b18fd50ff8bba5/2315592758.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/16462327738.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16085c9b21235d---duxet.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/sogerido.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/2a28a1a3a2d9b7421f92bc758e3ce4c8/tebejumepepukoxax.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/dewefad.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160838b0811f3a---39032532725.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df9bdb845dd---likepebizanak.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/27730332181.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/ripifafube.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/69220833047.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/misojo.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c07a902e25---fixilozofepidixanoj.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/62142534547.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/84965d26801e494c5718a56c92832ea3/nikuzikijugadubu.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/3b46h8ie25me4jveuffb69q9r4/87538138701.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/fediwefamomenulamef.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_off0000e441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE441 16812 bytes
SHA-256: 94fa5c829a412475fcd6197cd190ed69187c5a13442ad7e051ff605e043a0ad7
font_01_sfnt_off00011046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11046 11144 bytes
SHA-256: 672eb545c3cc7cf90d88ed73746ddbc92faee8063a7496fe01fe26a5dd1e59f6
font_02_sfnt_off00012a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1