Malicious PDF — malware analysis report

Static analysis result for SHA-256 6701728317df9e4d…

MALICIOUS

PDF

72.7 KB Created: 2021-09-04 08:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 2892da4ef5d9aca70c38b6e1d798cab4 SHA-1: 17c19c36769077181df4c72de43f6777c79a5be5 SHA-256: 6701728317df9e4da8da1bd18ecaaa68bd5caee128c0e5a3d1c062a7a3b9c1cb
176 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to lure users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://adirondackseafood.com/ckfinder/userfiles/files/37675554820.pdf In PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/gujetugobuzujisa.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdf9c82f92---bodumiwidepemu.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/36394935570.pdfIn PDF document text
    • http://grandbarnettfamily.com/clients/a/a0/a01b80d98e57c38af56892ab55e7d82f/File/valixevexitefopugon.pdfIn PDF document text
    • https://promise-land.com/upload/file/89622695916.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/34069576359.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/64474790175.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/wodazexixomudatigiferaxag.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/parotonajavepakitaruj.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/mijel.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/hl8ad13skbuvhgqjrg13dqio7m/wulisasi.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/3ff708cd2e51e4835cf32948bea41d4e/bejurus.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/45715528670.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24844494026.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4474b2b3b52ab1e4587b1f15c79b94c0/60679152962.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210522093511.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/74838794580.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1610e7d01ac2af---tever.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/0a5e7703811bf0fb62bdbd0c6f83d7c4/70522071354.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/80530a87e6f72731b84760ebe8de6824/zorepafixamidebilu.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/ea37477bdb62cdb07e25f7ba7b9be942/xevijilapuwase.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cadd9b8528---47346809612.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=rakudai+kishi+no+cavalry+light+novel+english+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160996927e53ed---kadikawutij.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_off0000b683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB683 17156 bytes
SHA-256: 37674980dca383276ccbf8ca0a40e1220f938873fec642540428244e8fb304fd
font_01_sfnt_off0000e234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE234 11316 bytes
SHA-256: c7f6d470dc340da1ba9971b696266a8d4e7449407b08054598d0c7f129040950
font_02_sfnt_off0000fca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1