Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08dc2f3ede9aef7…

MALICIOUS

PDF

122.1 KB Created: 2021-09-05 01:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bbe5afaf2a57033668219f02cfb52dc7 SHA-1: 5173615722a6557dbdf2a597572d5e8839d393ca SHA-256: d08dc2f3ede9aef78c4a963ff863fd0c0c4fa5aa1557ffc1548c0a1f6304d056
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or link farms on disposable hosting. These elements suggest the PDF is designed to redirect users to malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://catamma.ru/uplcv?utm_term=social+media+journal+article+pdf PDF link annotation
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/aai7ueqkpng02o6u6ic0n96s6t/wovite.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/5a4b0962ed7fb07d85254f6c1387b861/72712477728.pdfIn PDF document text
    • http://srutimusic.org/userfiles/file/59273231776.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/bdnhplmh4gjr5gslgc64prrv77/fuwarom.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a660e30ca5b---bojomewofineresaguruleke.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071397232338---bokuzupo.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/19788600209.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16097e1f491ebb---zasesigemusazopazepep.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/6817d6033d1102fdab01cc9bc0d04cc3/tisedesorokewirafa.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926a91af592---padelugefonipilamona.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/627eccc46f3f0dd519feab2dc6e28117/sodizuluv.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/31880489720.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/20732305668.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2f10a4aed---79798303757.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/sozupodexegusoxef.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/88845880365.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb022b417df---80419939993.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/numuzerukul.pdfIn PDF document text
    • https://udruga-invalida.hr/files/20331232533.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0707410264---dujumewiroriwenu.pdfIn PDF document text
    • http://narzedziascierne.eu/Upload/file/71170559599.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16091b8b891659---60821465655.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_off00017456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17456 10920 bytes
SHA-256: 09199e27d82c837b5a1cfdaf89662d57f0e78969f075ee3968499d56de0c0bb2
font_01_sfnt_off00018d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A59D 20360 bytes
SHA-256: 9d81204a38c348e9cc6bf01e8c665785deebb7ff03732a179b6cccb6dcc1d4da

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