Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e977179151eca6…

MALICIOUS

PDF

73.0 KB Created: 2021-07-16 13:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d9341031ca99e4b280c097967b2e8b09 SHA-1: af47a3238b35f9a67e8e11f196d0519bffb39ea5 SHA-256: a1e977179151eca633b298c142e280305cb351a147cf50b86a9fbed086e6e934
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads. The presence of these links and the overall structure strongly indicate a malicious intent to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8295

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160869f0dd5700---8590634278.pdf In PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/4969eef5f87f6d6e47248dcc1f02106c/tituda.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/21679696411.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/likuxo.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/41723107090.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/85603929571.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/lukivemijuzoguzesusul.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/1f8f857aa85754146e8946d02fe81f02/24296639053.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/zomutamaxerupejigobuperid.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/ajjttlkbjo4n5fb6c8jbr6kfc0/79244992537.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/b86dce3c07884f5d641f79ee9e314fa3/nuseg.pdfIn PDF document text
    • http://weingut-suppan.at/files/10067097137.pdfIn PDF document text
    • http://balone.net/_upload/file///19318390789.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/37a93lo83namtt3h6nruk737d5/33468345124.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-24/20210524031350860775.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/7878221138.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/be1d6d1a8ee09c234c4a8359c4a1562c/ragonoleviguwekaxefe.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ad6885bc6---96242936961.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/42666384010.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/v4q8e934efst4oa4t11gvh02s6/tazugukevu.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/jofulafo.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/gerinimevu.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/ragibewatoroxaga.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/matat.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b97a885167---mirodisegepureribuzen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=baby+i+just+wanna+kiss+youPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F2 10536 bytes
SHA-256: 1065e0fccf640a700de6e5389765a21b1182216ec98ba1413fe49d1f3e76b577