Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0cae5e890a9b44…

MALICIOUS

PDF

82.9 KB Created: 2021-07-31 15:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5b40be441acb6a4ccdcf60999d0f6efd SHA-1: 9582ceaddba730e712de84cb7a2659e08be37426 SHA-256: 0a0cae5e890a9b44f26a87261110d515d99e5bb6b3e4eceaf9550586fea86e75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URI heuristics and the link farm detection confirm the document's primary function is to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://medvor.ru/uplcv?utm_term=best+buy+credit+card+status PDF link annotation
    • http://allprintusa.com/admin/images/file/2528823199.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/a77a042aa6e537ca5bdf7d6bd8b08af5/70242932317.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/c8d3a3e0e6a120136001d48be0b4c529/31204527592.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/robivademubuveni.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210604014707442.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/47171370538.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210627202340.pdfIn PDF document text
    • http://consade.com/userfiles/file/8399165598.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/38069278986.pdfIn PDF document text
    • https://service-panev.com/userfiles/pobasufidoruzew.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/67326381658.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa8f70fb32---xafuvuwanijuku.pdfIn PDF document text
    • https://ivanamihic.com//files/rokesujobegaluzi.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/mozun.pdfIn PDF document text
    • http://cymagun.com/userfiles/52930145178.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/fusuvosuvazafaganigo.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/5d6539dfd6edf6fd69d228418ccf8cf4/41274586342.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862659605ed---fadomufur.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/facc039b28b40880c83c29bf72127845/94876414928.pdfIn PDF document text
    • http://hopkins1983.com/clients/861771/File/wavovajemuve.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/87391090318.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/4288de2516bc2bf3c1dacc760ba8e62a/84633173230.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210612071835.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/33269244498.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/85252410086.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a8be6c5d061---97745635335.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_off0000e006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE006 10500 bytes
SHA-256: 01f68a12497cd49ba73c9f37180e51b2374d4f1d226aa92d1fc9664749e3be9a
font_01_sfnt_off0000f81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81C 17020 bytes
SHA-256: bdaba03e69e0f58dad25e03de291d6a1467a32870588659360a7b96038028b99
font_02_sfnt_off000124b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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