Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da2a0d086cf78a4…

MALICIOUS

PDF

86.1 KB Created: 2021-09-02 15:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e4dffb41e1e4ab0be5ec6a2d9943087f SHA-1: 614f2a86d3bae72ccea6e45835967ebbd9f6c786 SHA-256: 2da2a0d086cf78a481babbc629393a82bb8202df10faf7f35090eb8f8d0cd0c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, so the analysis relies on the URL heuristics and AV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://heichapuzi.com/uploadfile/file/pejunavojogopawubes.pdf In PDF document text
    • http://jr.ac.th/ckfinder/userfiles/files/96412146142.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/85miqmc4r5gld3cqtgpf7du619/8924339795.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/gujosoneki.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/liwiguxago.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/6e8757a151623f82d482d851137cdff5/teratutamekinimi.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/vobojekuvuwudozi.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bb39eba4c81---78015117690.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/mabugelanarim.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/mer0i00d4i8mkakra9sd174vh5/71132788129.pdfIn PDF document text
    • http://thegioioto.store/upload/files/mumupizeputifugod.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/78c971e465964dd80cb9ab3e7e46d298/vabutiritagowanege.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/donivapiv.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16124859127780---2274036437.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/basunenetifikefisiwosi.pdfIn PDF document text
    • http://brlairport.com/images/file/gunuti.pdfIn PDF document text
    • https://totounited.com/contents//files/23559639866.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/75365224657.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/46387190041.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612b20296fcd3---nuziroropadamokiwapotapo.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/59057941487.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/zijiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=toshiba+e+studio+2010ac+manualPDF 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_off0000c68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68A 11032 bytes
SHA-256: 41a3e2ae9323114bf423e30ac7cd70e8da433af06ff0a8696f331a90fc7acde0
font_01_sfnt_off0000e015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE015 23900 bytes
SHA-256: d8b25c139db7cb9ebc4696f365f4aabe18b9b2294790efdbec2c2456a6f5efca
font_02_sfnt_off00011c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13487 16132 bytes
SHA-256: eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8

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