Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca286e3359c074e…

MALICIOUS

PDF

205.4 KB Created: 2021-06-27 20:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f7bea24c476a4d9aed554e700df4c42b SHA-1: 1b3eb97b002e97e1cae89c54db060a4d323e910d SHA-256: 1ca286e3359c074ea4dd13dc980669aa313083a56b1b49dbe7a173561e70ca7d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content under the guise of 'excel learning'. The presence of external URIs and the nature of the links suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7794

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://laborke.ru/uplcv?utm_term=excel+learning+pdf PDF link annotation
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/genetepape.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/mj7ulp5lcai20q1q0ho4qrggs0/sutig.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/265d3f6eb034f5280835e164fade10e4/jerofijibababoparilifefe.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160949ba03ce50---54765683299.pdfIn PDF document text
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/61483940380.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16089a86e92f9b---45173414104.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f793f97233d6fa452dbfab3cdd947c1c/55729568120.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/71705827675.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608284ad4990d---wumoxadogagubofedug.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/57f2550b090b07718bfd41cd275a9996/wulilanesigetexoferegibit.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/1c8293c210127f9b21193c0a0c938fa2/27579862958.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/vumekulezom.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/rohbak2lacs3gha26ue91ft2ee/nibakekodud.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/3i4rm9eu60nfgj6duk66ql86i2/1258049359.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90558921d---85821873311.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/6be1e95f0c7e4a49bfbdd6b42721ae87/64360210210.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/fukekizipukag.pdfIn PDF document text
    • http://soles2walk.cz/data/file/felilawawuso.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082d621a44f9---kurijiwa.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7e41a03fd---nokofakiw.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16093cae0c825e---podedumozolod.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/c0utubc7pdtoj672ph5vefafm7/tejirowuvo.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/723aa579aafe1cf2eb98ef73dc32b3bc/38805626295.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D93 16520 bytes
SHA-256: 4ee7325e85fa3732a7e01dc0312e3ac4b0ad57f3bde74b8495543293bd57c147
font_01_sfnt_off0001247d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C8F 17156 bytes
SHA-256: 06b9b8044fdd578ac94228b1cd9e648f3f918b0208b48768afae68ac2fcee20e
font_03_sfnt_off00016a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A2D 173488 bytes
SHA-256: f5e2ba109e385d6f64c90f80ca2dc98917745590a25f411f888f58a36bddf2d4
font_04_sfnt_off00030df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DF4 10492 bytes
SHA-256: 5339adeef304becfa268edf76263d073a477d3282d8c4929beebc2c486d1344e

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