Malicious PDF — malware analysis report

Static analysis result for SHA-256 86fb06afd530945a…

MALICIOUS

PDF

63.7 KB Created: 2021-09-17 08:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6819a14b73824a68e956ee2558cdce3a SHA-1: 51be1c3d0724491a6fa341511af1c35bb7942420 SHA-256: 86fb06afd530945a09543b28d78359c64e0ee4a4a0ffe7076316804b4410f597
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7964

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=group+verbs+list+pdf+with+bengali+meaning PDF link annotation
    • http://medtravel.pro/images/hand_uploaded/files/56768288430.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/jufosama.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/dibagazunowufibu.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133034c8d1ea---84425002772.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/narexojiwejomosu.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/69066795178.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/wadujopitugawumam.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/10879197563.pdfIn PDF document text
    • https://pilot-nav.socksnbows.com/ckfinder/userfiles/files/74693218795.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/050201541575.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/78170123045.pdfIn PDF document text
    • https://homestayhoian.thamtuddt.com/uploads/image/files/51266841649.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/54499548854.pdfIn PDF document text
    • http://magdrywall.com/project-new/christianbook/upload_images/file/55216534901.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/15285686706.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/zelowekiwuwes.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/jepuralafigatonijimeveken.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/90432323890.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/55672131335.pdfIn PDF document text
    • https://vozilasavozacem.rs/files/bedidujilefuwevizoz.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/33ac4fbee07ce95719cd2bf175687a06/31963181692.pdfIn PDF document text
    • http://bassonconsulting.mc/userfiles/file/womumizejopuridi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC16D 11376 bytes
SHA-256: 8e73c98dad87c9138d9036355d2f29b5460c6f87948d0fc7f0dd7532525da41b

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