Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eee924ab47ababf…

MALICIOUS

PDF

100.3 KB Created: 2021-09-18 06:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2d75f44fd43ed211db6d4808f2a4135c SHA-1: b3d0f71c6b4408d036a56ad7c7f7a61168ace51c SHA-256: 8eee924ab47ababf11237c537cb91868b7bfc104913250a6264cb45cc971d973
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The presence of numerous embedded URLs, many pointing to potentially compromised or suspicious domains, indicates an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL distribution suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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
  • 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://kaimano.it/file/74538043149.pdf In PDF document text
    • http://seibyou-koujien.com/files/files/59998186314.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/ikg1ro472j25cvv1rsk2su1612/55747758576.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/rajudirizojopofesukaxix.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16140ba2720f26---mirudoxaxirozaxe.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/ab056e54ce620b4314fabb0db78728b0/84928860785.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/samiridovufopatujizomu.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/fibigimesomiwadila.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/60176238071.pdfIn PDF document text
    • http://finchamauto.com/pics/kabaxorux.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/zanunenogevezudewabi.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/66338784687.pdfIn PDF document text
    • http://tochalco.com/uploads/files/sexazefagetowixupali.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/9347940703.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/37218282188.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/geriwitili.pdfIn PDF document text
    • http://lulanjina.net/upload/files/3118333764.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/10861500467.pdfIn PDF document text
    • http://hcstonetw.com/uploads/files/202109031405408672.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/5312368284.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/pipuxunedodexixol.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/tekopimavoxabumofel.pdfIn PDF document text
    • http://topstec.com/d/files/xupemutuvadimona.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=what+can+you+do+with+nether+quartz+in+minecraftPDF 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_off00011e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13694 19968 bytes
SHA-256: 94eea51eb9dde199f8f8e20091468d210c9a98326fa6eb0924d0e676353b5c45
font_02_sfnt_off00016a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A46 11028 bytes
SHA-256: 810d46a3261a5c72381a2593d82258b156d29e4b7ca256816d7feb55535d3cd1