Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a501cca6fd336d…

MALICIOUS

PDF

96.0 KB Created: 2021-09-04 22:18:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 962b73495ebdbc2ff6ba15d0ad7c44da SHA-1: 4e1847e7d163f5e849ebff448e13236b942ad142 SHA-256: b5a501cca6fd336d8c5faadf7df4c8dd32cdf7ab80f2ab5fa369ee5af5c416a0
124 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to various websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted from this sample, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier clean score 0.1738

Heuristics 5

  • 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
  • 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://southfieldhigh.com/clients/a/a2/a202dccd336a30abee2d0a4364b9f07c/File/xinivofozotasa.pdf In PDF document text
    • http://udmvdpo.ru/images/files/50122593091.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/geditefajusowo.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/jipimikelomipafopoput.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/lugumevofawavitij.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/diwapomitefobo.pdfIn PDF document text
    • http://artospace.com/pics/file/nakexiguwotujazuxufos.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/85314277347.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe249b22f2---zegemetozusolilum.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/d0445d3abc6f768d1442344e0f6c7da4/nirilek.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/didufip.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210731_C6BC25142D90DD0F.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/ronajomazovataluf.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c729d23a864---43971225155.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/84859782574.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/51796240296.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce11ebfdf8---55213070219.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/51829313759.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/jlp1rib1paqosm5dlfaifjbvq1/wadinigixofefemig.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/5373372948.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/35584166246.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a6a89459f---mubovosijuxulabar.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/wezetotevadeniluko.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/62943987054.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/f8d9339a51a30ff3176806a9b1f7bb29/29004318411.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/dc8f8a35f10dd4e37fb043030d2f3a6f/fokobegomemewu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=amplitube+max+manualPDF link annotation
    • 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_off0001190b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190B 23344 bytes
SHA-256: 0e726f263a77566d4b07178e57885ea062edf98ee30edfd0d55f7926a8901455
font_01_sfnt_off0001553f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1553F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D56 10348 bytes
SHA-256: a920b52a502c0c611b6405ee8f9c8277f010fe67cecd69f0a7b508991a3f4366