Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e214118b0d905a…

MALICIOUS

PDF

86.3 KB Created: 2021-09-06 20:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6266f8a718ce79d493a9868ebf4fa01f SHA-1: 96172f0c13d79e9dda662ef63f57e41234c1d057 SHA-256: 59e214118b0d905a092c64136226ca7e6b75d944bb0293e7d62f93b48cb61744
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to potentially malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://huntic.ru/uplcv?utm_term=diccionario+oxford+ingles+espa%C3%B1ol+pdf+descargar+gratis
    • http://abwcolley.com/uploads/files/38367275238.pdf
    • https://webmakler.org/userfiles/file/64927825300.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/5fb3nhjbc8fmj8ptlbi1nmbj20/dusirunovuxetim.pdf
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/7e26997c66d76d791376bd93b2f144f5/62504183140.pdf
    • http://papinchess.ru/userfiles/file/kokefijinutolegukavuwog.pdf
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/zimewupubarivomepuwuweg.pdf
    • http://zpb-maciejewski.pl/upload/fck/file/65546397684.pdf
    • https://bulendengin.com/upload/ckfinder/files/92958857743.pdf
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/98530005104.pdf
    • https://vishalahospitality.com/ckfinder/userfiles/files/zivuvotubeduduxupetajaw.pdf
    • https://electrodomesticaruano.com/images/ckfinder/files/fakozenuwebenepadurebutu.pdf
    • http://dailymaydemtien.com/userfiles/files/57566466059.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b02b5e01674---bojasepijuxijar.pdf
    • http://www.sanruou.com/app/webroot/uploads/files/ziwewematebe.pdf
    • http://inventory-acepipe.com/images/uploads/files/9311233938.pdf
    • https://catwalkdogcome.com/editor_upload_image/file/virogenerobam.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092e48164b76---levinogujibezawifonugu.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/alveoedfj30jdppcf9i2v5krm8/kuretamipokukasudesan.pdf
    • https://gbagencement.fr/uploads/file/forufiretabetoxoz.pdf
    • https://efnnma.org/files/file/35333722715.pdf
    • http://bortran.com/upload/image/file/20210601062158.pdf
    • 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_off0000e452.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE452 16792 bytes
font_01_sfnt_off0000fc69.bin
b3e3fe0132c59e3a9a66802d8424ab511b63d23dbda15952606ea5459bcc183b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC69 11104 bytes
font_02_sfnt_off00011605.bin
521d9ce01325541fe50ed7d8baa6cd4621a4b9360e94134d76920df004e8528b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11605 19808 bytes