Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea1632e29550ddb…

MALICIOUS

PDF

80.9 KB Created: 2021-09-05 08:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9f2a28c3aa4a433f8c266b9db1af9aff SHA-1: 0e6bc635fde473a4bde4052644b33e6d1d566169 SHA-256: 5ea1632e29550ddb6ce9e55cb6067625662b1c231a92c8f2c4f0fe87741c6918
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to exploit users by directing them to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/5pau9lkt9sarmb231tl0gqco28/71877937434.pdf In PDF document text
    • http://savvyais.com/userfiles/file/bovemomefugun.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/41278661466.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/feda725cf32683a0866d4c4deb4535a8/71055554012.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda80fa02b6---rijowomufuv.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/temolozaxadex.pdfIn PDF document text
    • http://lroundup.com/clients/d/d7/d7466da0ad72d96b64793f89c518a0d9/File/zubupinobokifolaj.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/i8aijj0ik67srmmbkd0m5vaf2cgha8jr/kowujutikukevaneva.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/wuxedudepagosoxarunoge.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/fc18cc1510176b73750509f50426e994/fobuzunul.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/ed18d306d1575085b5620058321b88d4/sinidagivisutazefemi.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/tivig.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/dalisasidoluvubiz.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/65376050849.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837d73ee487---84971382734.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/karirurikoxar.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/54009753484.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/21323224879.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/virupo.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/18300623850.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/p9seocms3kf939801mecqkdlhh/54033995012.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/d918f6f2bdeac54c9ba48cf8680786fe/93774107517.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/joxeki.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/7021306491.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=modern+optics+lecture+notes+pdfPDF 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_off0000d5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EA 10544 bytes
SHA-256: 8d1fe04f483a4128b4f6aaa5f8f77eb808ef8b02dc224234ccc6f3f6834db383
font_01_sfnt_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001061f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061F 18404 bytes
SHA-256: ef42d50b31ea087b61a6526e0515a20bbe3177adaefdc90cefe55327174c9a0c

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