Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b86207398973f3a…

MALICIOUS

PDF

98.5 KB Created: 2021-06-26 09:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a75386501c90a3cb9f7abf7f72e690cb SHA-1: 004337e9b5aed84aefd3c74876262ba6720869b5 SHA-256: 2b86207398973f3aeb4556cc638b709f9173059ebf7808a6a29c21c3abbbf5e0
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on potentially compromised or disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, despite some being marked benign, are part of a pattern to direct users to external resources, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/fe3jskuop2ffjbraoabbp5oqv3/76594923465.pdf In PDF document text
    • http://mobilesamara.com/img/files/file/pivatepisexef.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/60777459585.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/wuxuxizemadokawugikumiki.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/lquctnv156i7m8k2n58s4pa086/66670270344.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071f395e21c3---64234098873.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf50b4ab8f2---ravapukolojivezexixuv.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/zibomorod.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/ddbd4713c80c9852059f065632bc0493/99596438138.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c637ce061f0---14013419880.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/kt86k4jfnibp3n2dun0hdt2926/bugekosebagodom.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/da8bd493bff10f1c70641bbd595aa641/88001702527.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609842be44d79---92144554997.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f54178321d---bowedodefimowedexaxigamo.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/92649760015.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fab3e3f57---suripimerem.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/gunafimagojoziwap.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/2cofoldc7uo0rfepba80ihu66f/rotupanowopumovijun.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e35f2ca046---18560865841.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/hro3a6gtnls7j1rrrah6b5iqbq/voxakomenimetukij.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/nuxufixenobuzunetolekisiv.pdfIn PDF document text
    • http://allasclub.com/campannas/file/76951008435.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=application+letter+in+emailPDF 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_off00011ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECB 10348 bytes
SHA-256: 513ff87e7c1ddde59ca267f963ea90861db78d1d1198da81f90031b66f1d46c4
font_01_sfnt_off0001362c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1362C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E3E 18040 bytes
SHA-256: dfce2d0f4673060d53989d8f2924b905ea177c428b0176f9ab809069a52375a9

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