Malicious PDF — malware analysis report

Static analysis result for SHA-256 80178116847f9847…

MALICIOUS

PDF

64.0 KB Created: 2021-09-19 00:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a3c2551e8bbc6cfb1ca8aae48f114a1 SHA-1: 1ff53e32e0bb3fb0337c0709ae5a289a9ab39528 SHA-256: 80178116847f9847dbd1fd5d270749074bcd5725b4db447897e3412471c80fdf
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many hosted on compromised or disposable domains, suggesting it functions as a link farm. Heuristics indicate it's designed to lure users to external sites, with ClamAV identifying it as a phishing trojan. The presence of multiple PDF link farm indicators and a high ML score supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9586

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
  • 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 https://asiapharma.la/files/files/maleporinebum.pdf
    • https://aquafilling.com/userfiles/file/dugubo.pdf
    • http://uteambio.com/upload/files/36061368273.pdf
    • http://zoldjogsi.hu/uploads/files/82512431160.pdf
    • http://flyingwedge.com/uploads/assets/file/febuzosaguwuzepijerefed.pdf
    • https://vilnius.cvzona.lt/resources/img/files/xedexutavo.pdf
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31816418640.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/07e601f80c327fb5062793872c472a2c/wafusoderokubivekoz.pdf
    • http://hanasushipickup.com/uploads/files/xivipofafifolewuzo.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/46720c57f33ed3e2bcf4ccb3b07e2506/53779875930.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140256cbf573---fujaz.pdf
    • https://aimara-bg.com/userfiles/file/rolatesafig.pdf
    • https://oklogistic.lv/upload/file/76589571193.pdf
    • http://xaydunghoangthanh.com/img_duhoc/files/49931964277.pdf
    • http://likebarcode.com/image/files/20210913_220940.pdf
    • https://bunyaminerdemir.com/resimler/files/87932644856.pdf
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/28663445906.pdf
    • https://coluer.ir/documents/file/71059447839.pdf
    • http://shopgraeagle.com/ckeditor/uploads/files/jamofewelewetorirafumexa.pdf
    • http://watch62.ru/files/files/36300669392.pdf
    • http://yucehukuk.com/resimler/files/ritisu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=hogatoga+free+call+app
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8f0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F0 16792 bytes

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