Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c6bfcbdac0b326…

MALICIOUS

PDF

205.1 KB Created: 2021-07-16 08:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d6be44695f98b81956a7e795521e79b1 SHA-1: 4d884e24987d7245d1d60e74d6344958ecaee48f SHA-256: d6c6bfcbdac0b326691103079a5f291ed75a8b31443295891f82684aad875d3c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of a link farm pointing to compromised WordPress upload storage suggests the document is designed to redirect users to malicious content. No scripts were extracted, and the document body was unreadable, but the overall structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9808

Heuristics 5

  • 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.
  • 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://aradmissions.com/ci/userfiles/files/51122684975.pdf In PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/716803a15a8c9596ab97cdbaec93eabd/wewefifevakaxoxafanedunit.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087e029a16f2---49848820339.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/watizajanaxezolavop.pdfIn PDF document text
    • http://asustainable.com/global/file/dugukosawoxawuwozupixita.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160763dfddae71---9750634194.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ba0ubgapem8eh15j4mlcpbebj3/wadeviximakopobep.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/59b8cb6c87174b2234101fe70716cb42/56576516509.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d013aca92---ruzageworikewekugaxiw.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16071cb501be7f---sugawibij.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/130b900352a1b6953a629f7a23129417/felutixot.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210626094859_ddrges.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfd050decc---78634349163.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/taxabixorekixakili.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/78821265946.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/48e430e5fabc657891e5e588cb5f2f13/12963782615.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0hf4ur9v6111ruddh4aqplv2m4/51386842813.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1c2ae7db2---woboxa.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/b70e70e8c7b1c6a73cf6371ea80804e3/taromuzizusid.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/nurutufus.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a00e133a4c---nagodojit.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/954c6632fbcc2d60d2bb6e5e9e7b6842/xipoxubuvolaxa.pdfIn PDF document text
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/59873556995.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbdf8b4940---23121713586.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=the+quotient+of+k+decreased+by+4+and+9PDF 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_off0002bc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC6D 21604 bytes
SHA-256: e82d579e452b59f34d8b2ed132ce4ccfe55088b026a27143ef78e4d414cb692e
font_01_sfnt_off0002f357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F357 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00030b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B6E 11328 bytes
SHA-256: 42d5a4700d54efc5f36cc65e27501cfa5ef65c7fdc7d0b020e27520714ecb966

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