Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba79976640286c2…

MALICIOUS

PDF

70.2 KB Created: 2021-09-07 19:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8aa5ab36623ca5a909b98a5cb9225338 SHA-1: ba3160da64b57a7a804a2d74e0098b50d6846199 SHA-256: 8ba79976640286c26500d128af8e0963cefbe4049c329d79b185f131803cae96
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

Heuristics 5

  • 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
  • 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://airshow-bg.com/file/linazolos.pdf In PDF document text
    • https://thietbiytedaibao.com/media/files/9278831106.pdfIn PDF document text
    • http://househouse.it/userfiles/files/47401655829.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/vimerepazopitonu.pdfIn PDF document text
    • https://alhurwallpaper.com/Files/files/48746252437.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610eab346a341---15739585766.pdfIn PDF document text
    • http://lhsclassof68.com/clients/73441/File/42480585053.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/76574976144.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/80559420497.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868510cbfcc---76652735162.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/1e5e1bbf5bcedb5e54f74f10dea252d0/4565738884.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/44961785999.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d1184c8b7e---bikuxirawulexonavowagukol.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/62570655788.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/80556949597.pdfIn PDF document text
    • http://qqsbg.net/uploads/file/92884030640.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/99988070328.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/19345984752.pdfIn PDF document text
    • http://bwc.lt/i/kevotejozitanadekum.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/4a40e6229ca46987a0eb4fec94cdc26c/6830395470.pdfIn PDF document text
    • http://holzweiss.at/porunitirav.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/813b562397029b2a2959e48f96798771/bixekolilawelojugebe.pdfIn PDF document text
    • https://subarini.ro/mm/file/25334050110.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=manning+spring+batch+in+action+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE4 16328 bytes
SHA-256: 5df9ec30e2acf658fa56ae0fc6c55d2f6e8f8d03d5c44090e6e4980ede9cef87

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