Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd07c590e68e000…

MALICIOUS

PDF

91.1 KB Created: 2021-07-31 07:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 67978fa856ec0e07d9fc960bbc13ce2e SHA-1: cc4fb8cada7e6c8d1661547256e4a6edd26567d7 SHA-256: bbd07c590e68e000170469b31fe3f639c240f913db5df6cb99ec0b954e27b27d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage, suggesting it's used to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf0b119861d---7610526712.pdf In PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b543c6e13d9---wakuzunawegonibijana.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a246853e201---57361208246.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/d3mv6lnu6jgu95d3ghh132gsqr/novovagipu.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/99925658028.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/67365014938.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/kibupopudivob.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/63057fc0bed865445c2ae6fe9133fe53/tawisefovifaten.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/90440942813.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/o4gs5uqh9dakbttcopjf3q6p0l/91756407924.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/8ed2a85ae50afa98c8e7e42c46adc5a2/18661691489.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079f6fc71871---kefiwuraxapavedonez.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/40856197925.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2e756d9bb---dotijori.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd32baba33---42445456810.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbc9c11f38---84909159399.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/20829771413.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/3ea32fa78265d07a17e95a69f176205d/vowijopu.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/robalofegex.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61718d0380---87094262019.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202106241720165411.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/7c37df5c5ca1cab1da842cc089213c31/kavuximotinada.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/ada15fcf9f972c4e62c2999b3c4139ad/40452843471.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d1af91994---lupinobiseruli.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d64caae58---nixuxivugud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=ubqari+magazine+july+2020+pdf+free+downloadPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CF 16392 bytes
SHA-256: 30f477a2586d14508cb5ae6f52311d2aa577bdd4cae9da050eeaf182a0eff5da
font_02_sfnt_off00011c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C57 11600 bytes
SHA-256: 5dca10f799eb71305fe5d7672ab978fba500b4a2ba1d592eb43d99940eb510c1
font_03_sfnt_off00013733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13733 22128 bytes
SHA-256: 99e56bc5d3d9a3e6864708696be7b94b5d15b8b5d3c03bb09831278d4e2322c7

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