Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6ada9e6ccfbccc…

MALICIOUS

PDF

82.3 KB Created: 2021-08-31 18:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eed13e50bbdc6b5ea7d060ff32468af1 SHA-1: 13767f4aab830733a9d2f40502e4573d844dd303 SHA-256: ec6ada9e6ccfbccc035a10459c6f8def4a4350af0a5078802646895fde62228c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to exploit users via external resources.

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://provia-events.de/pics/fotos/1/file/velivu.pdf In PDF document text
    • http://narnivet.com/userfiles/files/vodozewobititatolekewep.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/jovemerugemuweta.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082f7c833805---22112270335.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712d231bfdd---nibipabokedifimamadaxab.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd0e518e1d---vubugelekewulogud.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/datadovipudibigumojur.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/18283518312.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/26992365588.pdfIn PDF document text
    • https://naves.cz/res/file/pemafiwupojixub.pdfIn PDF document text
    • http://classtool.info/upload/files/xibasugijulisud.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/36069531784.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/tipezo.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202107/file/1625883194.pdfIn PDF document text
    • https://webmenuplus.com/images/file/83662891216.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/jivotesazowu.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d3bc45fba9---94611457939.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210630_FE455FE3111232E7.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/f9d12592aca409eec96a29c3776fba32/fexut.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/72148756760.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/badisowaselisigigej.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/19tudd8a4a0gqd0r1r4tnt8g30/matilafivizorazolugafopu.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/98924037263.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=biology+for+a+changing+world+with+physiology+3rd+edition+pdfPDF 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_off0000d9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A9 17092 bytes
SHA-256: 9bb2ef4dbb2250a7f4c20f3c44c647116e5440e9da217e22a2af71a38abc5c5a
font_01_sfnt_off00010571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10571 11324 bytes
SHA-256: 34644524c0dada357d2e7919f355e6e594da5237aa25db8f7b11b26fdc706222
font_02_sfnt_off00011ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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