Malicious PDF — malware analysis report

Static analysis result for SHA-256 896a6fc5b1180f4e…

MALICIOUS

PDF

75.2 KB Created: 2021-09-17 10:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a6eb6c36ad57be8a856eccaf0f2f752d SHA-1: b55acfad858ef4b80c28e989f1ec3942567cc7bd SHA-256: 896a6fc5b1180f4e88f087b3d8d0fa8762b37d0d5ec3408af6fefc84a365536d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs that point to various domains, many of which are associated with link farms and compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure and URL patterns suggest it functions as a deceptive link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://philabc.ru/uplcv?utm_term=mortal+kombat+mobile+hacked PDF link annotation
    • http://abwingscolley.com/uploads/files/dekiwawisetetinabaj.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/tivateganuwabuni.pdfIn PDF document text
    • http://cityfate.com/files/files/74626208927.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/26523579488.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/guvowenuwexi.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/gorifinipipukekewitikowuz.pdfIn PDF document text
    • http://dytac.hk/userfiles/9050122579.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161320cd435ba1---novijozubekewenemewitewaw.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/tuforigunizowe.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/51536486770.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/3503775568.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/60539265894.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/cddae56f2d1687456da0f45aa3e0faba/zutoganezafevurolakukav.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/nanokexib.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/30837903653.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/babedu.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/66bt0dqeo2omqmudlg20pe5j2g/17255315699.pdfIn PDF document text
    • http://natpuedu.in/userfiles/file/4623865712.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/614410d16bc7a.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/15523898676.pdfIn PDF document text
    • http://designgaleria.hu/userfiles/file/tujurogibazudu.pdfIn PDF document text
    • http://vinaaquachem.com/uploads/files/80181728196.pdfIn PDF document text
    • http://specialcats.nl/media/files/jiperikubudukavopido.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_off0000c1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D7 17744 bytes
SHA-256: 1f307df830a863b51d4037124ea2c2808289186edc35e822d53476a7d9fc52cc
font_01_sfnt_off0000ef85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001079c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079C 10588 bytes
SHA-256: c9c5511ae74ab648ec6180bdef0ef71343167b5fc424c4721cadcb35cc353c1f