Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8cfa89e933c4bd…

MALICIOUS

PDF

360.2 KB Created: 2021-08-15 16:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: ef0ebc38a152efb266ccbb667e4e3da7 SHA-1: 9190e292a71079fe8207a44f961a8e611181e612 SHA-256: aa8cfa89e933c4bd23878d4ebebb3f096ad5d667bb4e628fc67a3aa02da719c0
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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
  • 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.
  • 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) or Microsoft license-boilerplate 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 https://synerhu.ru/uplcv?utm_term=codex+craftworlds+8th+edition+pdf+download PDF link annotation
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/11ae2a7be3a79fd23cceba7adaa740e1/18326627048.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/subemowarutomoxumadav.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/35456565624.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41835731176.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd42a98951---puzekupukasogukubaze.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/37127691435.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/gotudonafi.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/ece1bd9576ab9b9b6ec09be31e2d0c00/79715663340.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/66747700695.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/13161479271.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/87733a2d47aab8eef3904f6af7090b83/balejujefifawobusoriropuv.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/xevod.pdfIn PDF document text
    • https://lemanssrl.it/file/nogabasetuburujevezof.pdfIn PDF document text
    • http://sparkpro.lv/content/file/govixulavadubolekuliselo.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/72608667585.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/4c7478b69340e36f01f5ca67f452efac/93214003120.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/89d70c62c470a9745ea95b4102fe3cc8/kifara.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/57cafab42fc9ffadb78941b6b3c0ee6c/vixapatojegut.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jujowukelate.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f36735d5a61---8000183330.pdfIn PDF document text
    • https://oklasik.com/ckfinder/userfiles/files/sojefipakivemexopawiba.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/58665522488.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_off00052fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52FD7 19056 bytes
SHA-256: 040c8f27d35fa247fb746c5c3b816b0bd4071c94017acd65bd2a00655955b050
font_01_sfnt_off00055f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55F86 11144 bytes
SHA-256: 6a7c0c33fe86b52a05923249fe54d87b93a319104b78a8cf3904e1549e3ccae2
font_02_sfnt_off00057994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57994 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1