Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8c4538c5ed543d…

MALICIOUS

PDF

128.3 KB Created: 2021-06-17 21:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 61043d4dee231ddb747432f3eb130347 SHA-1: 427aedda480e1a4f8bce82c0667e82a1017dacc9 SHA-256: 2e8c4538c5ed543d92cdd1df8ad301dfadbe52964133d9e84cc0054ae57a6e17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/25485434699.pdf In PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ac06bd5c773---jixoweweperu.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/f97c9qmmeq6flarbfjo05ffgvo/67578229545.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b574bc8c7f8---jewelenediberamareviwugu.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/29983070329.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46890d3b72---xabupofozitanixamisoxuvex.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/682d5028b9c8c036c8c8687bc94fe68a/loduzoriromofavapinus.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/5mocr7mjpr6ih2e6c5iop01qhm/jotujoder.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a597f765352---vufanasixopejara.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbab16c69ad---26819582114.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160810170cdf46---2155750753.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/wofuwelexipaxata.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/7411fd1f8f5fb724297de36fdce050f2/87206550516.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/83rvb4r17dt9t37r78i1g53dua/waribazopalupevakimisopi.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/39007955000.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=dil+hai+ke+manta+nahin+mp3+download+songs+pkPDF 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18589 4092 bytes
SHA-256: 2bf4024773231c4cb73ec1844d9106a18eed860f8ba98552d3c34b91a37fbdad
font_01_sfnt_off00019427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19427 5596 bytes
SHA-256: eb20322cbde0e990449e3d5fc51f01ad6e5443125651e44167f86278dab22313
font_02_sfnt_off0001a71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A71B 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_03_sfnt_off0001afab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFAB 12356 bytes
SHA-256: b73c8d7a140950166cf27df7e96b6b1fd06a41d0f6daeb7a7a7017213b320ea6
font_04_sfnt_off0001d975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D975 6644 bytes
SHA-256: ae9fe54a9ca6e60efb86997788b4060602703d8522b61d41c21904e2455b0d22

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