Malicious PDF — malware analysis report

Static analysis result for SHA-256 29246c8966e32f46…

MALICIOUS

PDF

75.7 KB Created: 2021-08-21 08:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c9c8cb5fb28d1533c87af0d4497a399c SHA-1: 0eeb5e2e37128a861d645dc35a6cf802b44b2342 SHA-256: 29246c8966e32f46907682d55b930c564dad50f0400cd23633a2990008746d23
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous other PDF files hosted on various domains, many of which appear to be disposable or compromised. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, and the presence of 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests these links may be hosted on compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/79752050582.pdf In PDF document text
    • https://tipresentoio.it/images/file/xonalutila.pdfIn PDF document text
    • http://newo.ru/files/files/fasiberotokevi.pdfIn PDF document text
    • https://songhong.info/userfiles/file/rafevaxavubejogon.pdfIn PDF document text
    • https://hpsoft.shop/upload/files/babafafedir.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7f6f55bc6---nupagosogegipazaw.pdfIn PDF document text
    • http://allasclub.com/campannas/file/4703894158.pdfIn PDF document text
    • https://webfox.net.au/wp-content/plugins/super-forms/uploads/php/files/eccf68a0c2025add0c0e491f03db7b50/15414928603.pdfIn PDF document text
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/majujisosiruz.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/watozupugego.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/13809191775.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/wodebugek.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/4584610270c3730480755b5a81695991/nasimadevale.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/5325616598.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/5e1e26ee3cdd6c8f97b1313bb292e035/36346929384.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ddc7e7d49c---kezifabemusurobuvefek.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607c29d354194---nulixuletomizadazovizuxu.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609555ed0d416---78703284053.pdfIn PDF document text
    • https://dintek.eu/uploads/file/85160677081.pdfIn PDF document text
    • http://gptools.net/userfiles/file/muwiruwodijix.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/44796666293.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/tatofefevisusizit.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/1252260e396b1eeda77b598525c0582c/zifibevofenasezadomobug.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/61783784042.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/gomovasusiselajanijetam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=tekken+blood+vengeance+movie+in+hindi+free+download+720pPDF 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_off0000c187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC187 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99E 11440 bytes
SHA-256: 7e4a482efeacbfba2fb736b94988484f6cdd4c9bc78550efee939ac1c8bf3251
font_02_sfnt_off0000f420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF420 17140 bytes
SHA-256: 29c633ad57ca173f4c9b01c55edf89f746bebe0e26ed0154af2ebcd5f0b0f92d

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