Malicious PDF — malware analysis report

Static analysis result for SHA-256 f300ea46f1833709…

MALICIOUS

PDF

89.2 KB Created: 2021-07-06 21:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c093586e997003a8f41db7a2d850d40d SHA-1: 0c2ac87d5599f20afce52cd05d9566b75da3c2fc SHA-256: f300ea46f1833709ea5337663ccbf9b8dd6cb863f09c8ca21f44495fedf75922
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/326a08e057ccae0ae89711d0d7a3829c/23747448227.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9753b6bc19---sotudusumexenadunidoporaz.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68aa7a38bc---lizika.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725c292f628---71358643797.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794ad47d6de---13667251171.pdf
    • http://namadagaskare.ru/ckfinder/userfiles/files/95234292615.pdf
    • http://lubrifianti-auto.ro/files/file/gosasogibi.pdf
    • http://cherryontop.pl/upload/fotki/file/22978988016.pdf
    • http://bi-acaovo.com/upload/files/88466863957.pdf
    • http://konditsionery-reutov.ru/upload_picture/file/35258925690.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/13ce989da3c16691832667be2028366f/wuwogibe.pdf
    • https://holocaustresearch.pl/nowy/photo/file/58776295080.pdf
    • http://nctpa.biz/clients/5/51/51e593b678cc4707ea5ff7b662bcbdb9/File/47742944456.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/c57d2a820d42669943e1c319bdfaa8f3/17091700570.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/9ad76f026aa9b3f5e8d2a29ba1bca93d/kogatatumid.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f58495c7334c4bd0305d871ae8fb51c1/joxamekurix.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/ef67f231ab5aaaa4267096fa538a10cd/5238760986.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd4736fd26---mesiru.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/baf9cf50d099af22599051db724de973/nelatapuxowi.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a294a0df9e6---29769880364.pdf
    • http://botosani.ro/img/uploads/file/vokumekupigivezudetonura.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=colic+pain+in+infants
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd9f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9F 16792 bytes
font_01_sfnt_off000115b6.bin
375c67bd4be47c4ceb13fa10d7551049190a7131bd95c946d3f62807aae307c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115B6 10272 bytes
font_02_sfnt_off00012cf8.bin
cecb6dd1ad9d1789ae510205c1b2622dc2feacc3082cdca554241922d8fc093e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF8 16716 bytes