Malicious PDF — malware analysis report

Static analysis result for SHA-256 56246a97af61f8dd…

MALICIOUS

PDF

81.8 KB Created: 2021-07-22 12:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3d7bc0851d2e51acb10d2d6ad7dc5e8b SHA-1: 5fa2085af791e14ea9d042b6d7edee7a08a6dbf9 SHA-256: 56246a97af61f8dd64bfcc4627642cdb971a535a730057ea2ef36860f6ee8d30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous external URIs and links pointing to compromised CMS uploads and disposable hosting. These links are likely used to redirect users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/boxefa.pdf In PDF document text
    • https://oncetrabzon.com/resimler/files/93367280219.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/83968902798.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/25665033738.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4fa0a3b8d1---36184273224.pdfIn PDF document text
    • https://filetorme.com/upload/files/88529303951.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/29503494594.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/61362821471.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c6e529b09---32362481333.pdfIn PDF document text
    • https://artenika.pl/fck/file/88488219721.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b682321e805---26224643820.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/28115839666.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/wetegazorolivadutibogoduk.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8d459882d---muxojudarokuxozideg.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f1e19e04c---36386927582.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/63o1pgp2cf8qtrhmfhl84r4935/96526515524.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/mezapavepajogoxototegafel.pdfIn PDF document text
    • http://proxkimya.com/resimler/files/jugekutebotixanubujik.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3206e42b50---zurasobatemivunufapisev.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/29026087937.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160840c89819c3---filamakawuvetawosidew.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/716qe1vie29ojeh4fr60ejqq8j/24612648979.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=advantages+of+constant+mesh+gearboxPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5A 15860 bytes
SHA-256: d5b3c9dbc240d414bac61272c5ddc03df713911a5840c62c9113b33589ed3488
font_01_sfnt_off00010838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10838 11072 bytes
SHA-256: 9ffc2da6e26e0eff86d89f4a7ac2352c303bc6b17d5c6dbe376991f447e14aa1
font_02_sfnt_off000121bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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