Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8cac53824f0893d…

MALICIOUS

PDF

78.1 KB Created: 2021-09-17 03:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 309e0d884267560181aeeaab7e2e6a59 SHA-1: 1d00e191518fbf4a6b36674e963410c9ed8478d0 SHA-256: a8cac53824f0893d26a4da7589a294c4cad8b63abcfbaa3ea1295d7d5687fc8f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites and disposable domains, masquerading as a live football TV stream download. This indicates a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to deliver a second-stage payload via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7570

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://smidgel.ru/uplcv?utm_term=download+live+football+tv+stream+hd PDF link annotation
    • http://bftt.marketsearching.com/upload/files/lukavegubizizopozaror.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/7a8fa44bfea46a0ecb2128d7ba005baf/83913408182.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142db7a0177e---45024882555.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613940597f244---90437506358.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/97750339175.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/tepegivenajakitib.pdfIn PDF document text
    • http://aurastaffing.es/upload/file/34399879172.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/ruvizatokejive.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/jejepugoreliwalebaz.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-14/20210914070815517131.pdfIn PDF document text
    • https://reklama71.ru/upload_picture/saxibujokimuxopolera.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/weriselug.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/filoje.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/japafeweparopiw.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/roviwizukinit.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614254995ab4d---lotudikubeguwo.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/xexamafijurukaku.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/9166443aee5f509c9c2cac9aab15cacd/gatimegoletaduvizefifefad.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/nuxolelasuvot.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/66675096416.pdfIn PDF document text
    • http://trungtamsangloc.vn/uploads/ck_upload/files/zowatapafexanelip.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/raropitexedelalixeben.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/90f81afe8bdeca97ff64718c23eefd43/79296511497.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/63128803423.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE3 10912 bytes
SHA-256: db3e51849df016c43083a55a76decc23ff12ffdcf89aff0a7a928b30bd675592

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