Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b486237c0d466a…

MALICIOUS

PDF

89.8 KB Created: 2021-08-09 03:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 04d145a7170ab345eb51d90cd62d0a58 SHA-1: d253274ac1ce12cb949c3e7c1403d3660ffc3341 SHA-256: 59b486237c0d466aab71fa0c2370403019507565017dd04b133ecd6aa0ff61a5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, directing users to compromised WordPress upload storage and other potentially malicious sites. The presence of numerous embedded URLs, many hosted on disposable domains or compromised CMS uploads, strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/bef1a8c5c366ad5c8b7c3e5f74a88a88/5968910937.pdf In PDF document text
    • http://vyveva.eu/UserFiles/File/36460822555.pdfIn PDF document text
    • https://steammining.com/userfiles/file/36349842217.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/39349456513.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/suvel.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b48395e734---58918914679.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/203e5a36aa845bff20911c0d5c2db0da/75325921820.pdfIn PDF document text
    • http://eraucheta.ru/uploads/file/87082833205.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79241a474c---43425685929.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/popadozaxufosofukibuzavil.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a977b206c83---56898727433.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16076d7354a620---29813806076.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/dukagomilaxuzur.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607676c7aa8b1---lovadikoxedajoxaziletupex.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/8k5bqfui2et7cle1dlorl81mi2/56663482271.pdfIn PDF document text
    • http://cuatudongnhatrang.com/uploads/files/25782346656.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fba096eb7c---41790363639.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/bigibewelag.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd25e2470bb---18748044261.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b96f906deea---beluwuwojisubuze.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/29400315541.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/2373f5b4ac719fa1b256d796b2cd8241/80053279922.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/05db2a953d8f7ffa68829d37e9ae4220/falurowaduton.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608844e822cf1---81614524983.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/4b6de54608bf4a1db6ed95f1b92e9fc9/riloxulibozujamaje.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/bovezorusixe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=what+is+the+benevolent+fundPDF link annotation
    • 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_off0000f8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CE 10648 bytes
SHA-256: 8d983e2338de65dcee1ca476271cf8e2aa5b261e84ce3d661687a3ca91534956
font_01_sfnt_off00011125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11125 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12937 18176 bytes
SHA-256: 1a6b9ac8fb4e1b96a40e3f32769f5434a4e8586dcfd5151259939e4f2a018567

Open this report in the interactive analyzer, or submit your own file for analysis.