Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03337bc453a933c…

MALICIOUS

PDF

84.2 KB Created: 2021-07-14 03:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b686dfc28eec916967c1e2b3cb7d765b SHA-1: 06b4a3ce03b788a96c1f5494aae6647e032a940e SHA-256: b03337bc453a933cd391c3b9ac20085222b9412ca5dfae5039c8e7ee479b7cb1
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous URLs hosted on compromised CMS platforms and disposable hosting. The primary purpose appears to be redirecting users to potentially malicious content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/87555hnlf8bo9fi7cl6obg40lt/85045561155.pdf In PDF document text
    • http://artospace.com/pics/file/wugevagokufapakedivit.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/f2ff72d55fa59bb9741db20e3eeb6406/67539984709.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/powodepavari.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/d4b686a96815e72809f60a16adf12db9/55263735804.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160dbca9c4dae4---99079895273.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/38ac34a3209388a1ad40aa2ee91284d8/jozul.pdfIn PDF document text
    • http://farashimirooz.com/files/datubaf.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/9034231150.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/aabbfd4b049f0dc2a0f2f5ed5b3870ee/66548661488.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ac21427c8---73123423103.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/305862292a6dee0cbbbbcd15625cafe3/88706118796.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/10521912962.pdfIn PDF document text
    • http://diakmelo.hu/ckfinder/userfiles/files/keranotobunenuririzoso.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/e936791361ebb96e45f93bb973526b1f/7416948413.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084474b186cf---bazavelarofarozujojadi.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160eca3d8d71f6---62574800161.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/32255187538.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/t28l0puld2n8200bfrgb58458h/66960058918.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/506f1a9faabb88d5ea788fcb28d8dd13/vizotuvipenekerud.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/946fac25323951fe20813337303135e3/kowidurosod.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/ac984ec7546cadf1bef7f9e558a36477/28409421657.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/bb0487cef222abc13b49715ec6504e38/22621124909.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/70412137365.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=easterntimes+tech+wireless+mouse+driverPDF 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_off0000dd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD69 17000 bytes
SHA-256: e3ff7c41b034bfc5dcfcfa3aeacd64957f0dc83ef75b53edf8e3b35aa58500ac
font_01_sfnt_off000109de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EB 1636 bytes
SHA-256: e3a1ca7fbcde87b6e2bc585668cff1a50452d2a09c95c546c16e9f90aebd6500
font_03_sfnt_off000129bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BD 10868 bytes
SHA-256: 8bd174932275baa285716f73493685a25357318efc1f4ac44c7f19173da48e1e

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