Malicious PDF — malware analysis report

Static analysis result for SHA-256 485dfcbad9cce564…

MALICIOUS

PDF

70.3 KB Created: 2021-09-13 02:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4eaeb1de82fee81c8d4d92a2e8f50a5b SHA-1: fabd51ae24e81b1555a1e64e02432a9fbbd84f8b SHA-256: 485dfcbad9cce564b127385c351205d8d3b8a70f1f3ab53309c599ca7adddf8a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7230

Heuristics 4

  • 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
  • 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://willowslakerhea.org/userimages/62949732979.pdf In PDF document text
    • https://lombardpruszkow.pl/local/userfiles/file/dizetiguxuj.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/71491186532.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/77715850320.pdfIn PDF document text
    • http://oodow.cn/upload/file/210909132315109578l9e7vh6j16jv.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/91091962826.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021090603290060.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/27715122145.pdfIn PDF document text
    • https://duvarkagidierzincan.com/userfiles/file/zatuziru.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/kujivoxedanoriralozeju.pdfIn PDF document text
    • http://thefarmatarapahoecounty.com/userimages/91582268139.pdfIn PDF document text
    • https://yk-tech.com.tw/ckfinder/uploads/ckfiles/files/66487920571.pdfIn PDF document text
    • http://hzbmsj.com/images/upload/File/sadepiwiduzebi.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/52208767290.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/52211966987.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/25188493627.pdfIn PDF document text
    • https://reha.bg/content/upload/file/butanixatarimen.pdfIn PDF document text
    • https://gesema.com/UserFiles/file/10183446539.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/6953224483.pdfIn PDF document text
    • https://mattress-leader.com/media/xiburotebopa.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139363469436---34151099667.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/3d5f4ec041919e0c3c9a60a5e005a0cd/tezikujatevarulumupomeno.pdfIn PDF document text
    • https://mackbeks.com/files/file/43031235979.pdfIn PDF document text
    • https://signatureshreyas.in/userfiles/file/42879913401.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/kesama.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+do+i+cancel+my+hotmail+accountPDF link annotation
    • 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_off0000ca2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2F 10656 bytes
SHA-256: cfab43fcb002156aefbeb4dfc481ee4d3f5edcafc794710e0f033cfb908c4a13
font_01_sfnt_off0000e25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25E 17472 bytes
SHA-256: d31c09b81e6059d2ecde7207ff2ae14c909bfae1c669af1c1ab7284cc62c60f4
font_02_sfnt_off00010f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F57 1860 bytes
SHA-256: 562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560

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