Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15b1c50e44b5647…

MALICIOUS

PDF

109.5 KB Created: 2021-07-05 19:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8a242a35e03fc9b3209242605b726ac9 SHA-1: e0f6a8bde66fb705bea98b6121f7c446ad5fb9c2 SHA-256: f15b1c50e44b564786ca1758dbe7d5727ba8e0a9420c07ff91bca93b52183afe
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, containing numerous URLs that point to compromised websites, likely intended to lure users into clicking and potentially downloading further malicious content or submitting sensitive information. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest a coordinated phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://oniceh.ru/uplcv?utm_term=kendall+kylie+jenner PDF link annotation
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c96685da0cf---fefajavamuxujerepubov.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/7t933fjfc2cjq4o1av7aok3fb7/pekareleluzumafesudog.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/somijasiravatofise.pdfIn PDF document text
    • https://magatek.com/documents/file/31677652272.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/39346266261.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/3k4bjms7uscsm3au4kc7jjsih2/46356362735.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8929848276---poxoganugimunovivefuz.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/4118994524.pdfIn PDF document text
    • http://renknh.com/ckupload/files/42513046695.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/431734a80059171e6090440b129b9083/47319182159.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/268a8cf6a4fed5a0ffa86a5022f543ef/88016526555.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aae44132ae---1728974849.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/1405f5adf9de93710b82af62f0e9066f/24058140405.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c31ac29958---52678110760.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d2560e3e5e8e0db264c6d94aadb65e0/dulevaseloroxofokip.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/62940855442.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/16929312373.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/74811436402.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96ee307527---51846133076.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-6/20210506201731146497.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/88842510530.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/4sd4at1jq6vnqapr2fvcme045l/nivebenofowuzinife.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607281939f4d2---pavego.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_off0001462d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1462D 10180 bytes
SHA-256: fc1ba5867e106765bea5a7488f7c5215723c9980c23bcc4ef8fd929e0e1aa7aa
font_01_sfnt_off00015cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17508 20544 bytes
SHA-256: 7c5423396e43bca5a3caba32495dc9be34b6fa72fe6e8c967dab0bffb25369f2

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