Malicious PDF — malware analysis report

Static analysis result for SHA-256 23469293383bc0c2…

MALICIOUS

PDF

85.3 KB Created: 2021-09-12 03:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8da33c2494e3ed9348f074a8755d0037 SHA-1: c54fc146c12377188384d9da97648bb7de48bc0f SHA-256: 23469293383bc0c2244de9c18c171b026860f59d89404136529b1d6e88ed3263
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple external URLs, with several pointing to compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The file's structure and numerous external links suggest it's designed to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://huntic.ru/uplcv?utm_term=does+android+track+screen+time PDF link annotation
    • http://www.themixchange.com/userfiles/files/xeravagupuzepopewoxuxodob.pdfIn PDF document text
    • https://ubitanduk.com/contents/files/83536065120.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/96415734340.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/19232858830.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/9097832655.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/52727643265.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/pofasutoledaduxebepog.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/2e4c40df14f28ebe083a5024bc6a500b/18069469383.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/zibevurixifegapedotugone.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/80800794077.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210908022527431817mkvuk6.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/lubunolegupovebalu.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210908_A88F13CB440643DB.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/c79fb87daf88dc11bd1b07bce4e8b9c8/semiwasa.pdfIn PDF document text
    • http://artepcb.com/upload/files/23930910464.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/71454615223.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202109081317363337.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/poxatonenasakapepow.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/88657339843.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/menogomiruxofakawasibov.pdfIn PDF document text
    • http://rioairporttransfer.com/ckfinder/userfiles/files/futoganaxoxufagow.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae736477bd---33317842368.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/sakejarujedowitosuw.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/nogajafazinubufedo.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613896e2cb492---gulusekexejibanilixokosud.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_off0000e75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75C 10576 bytes
SHA-256: 8b9a12bdf108338f88c66364923ee67d6c203e5dcf7d368368840a3e63741282
font_01_sfnt_off0000ff82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF82 18860 bytes
SHA-256: 0afd98e5bf70a9b352290e407e10612f1f7e600c38b459772735308682f2754b
font_02_sfnt_off00012f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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