Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ce5317f2f82d2b…

MALICIOUS

PDF

77.1 KB Created: 2021-09-01 17:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6d1874e0b4b1e4e5776f7e94d2fb52fa SHA-1: 611933dd7118b97721033148b65cd0929c0d3315 SHA-256: 70ce5317f2f82d2bac79436c5e5af2df562ce8b103e351f78997f170393ba7e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious redirection techniques.

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://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/zosedekujojofobopu.pdf In PDF document text
    • http://mamolenasnc.it/userfiles/files/85017245754.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/11270153772.pdfIn PDF document text
    • http://broadmoor79.com/clients/864886/File/79825851207.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/87009112956.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/83085208707.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/53580796826.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/sanirorasuxilafexosow.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160ba62061caec---45242373756.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/vuvebemutew.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/24295783964.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbab54e76ea---9906206706.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/9951877885.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d529fc0e2b---kukorifidawokuwuxigigoj.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/pagibesumepidukigimukini.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/407f7fbbe814d5783ff8526374e59c4d/76944401927.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/lokopukan.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/1e8pqdfk48j480r5bug8qgtmo7/kawud.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/kiludu.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/velajodimevamanufevimovep.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/58897278593.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16114eccfe5045---bobuf.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/6141ab86b573db070f7ef80c90ad1410/xerogarozejuneruzoged.pdfIn PDF document text
    • http://araonline.hu/uploads/file/bonizodabalupunagoxijota.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=is+energy+an+element+compound+or+mixturePDF 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_off0000c840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC840 11124 bytes
SHA-256: 7b51b8f9bb5557375d2c929a4eae1d3e03b1a8869845bbdb03365ed9f72ac3a1
font_01_sfnt_off0000e208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE208 16668 bytes
SHA-256: 7be0d8c67f7e8dd4a6185dcd7bc4218fa6ea6044992960cf625256cdfb6b22fa
font_02_sfnt_off00010c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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