Malicious PDF — malware analysis report

Static analysis result for SHA-256 b009ff271d31c9ca…

MALICIOUS

PDF

82.0 KB Created: 2021-09-21 02:38:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61f270f2c546a334f219a50d9c05af34 SHA-1: 27e0a635476da4429627088770001e90430f0371 SHA-256: b009ff271d31c9caaf2b9a5a2a7a87f1e6f7dee28beb49b1570929692c1309b5
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary function appears to be distributing malicious content or leading users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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
  • 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://eternalbliss.net/file/80391159046.pdf
    • http://campfirewtx.org/userfiles/file/74601393002.pdf
    • https://dalycity.com/wysiwygfiles/file/vedebinivoda.pdf
    • https://ikomsolutions.com/admin/userfiles/file/1992480517.pdf
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/53222172420.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/a597098015654ec0c77a2c06046bbc75/36689433201.pdf
    • http://revucue.com/ckfinder/userfiles/files/nevawojoluniguj.pdf
    • https://institutdesante.org/userfiles/file/25705116457.pdf
    • https://luiginoiobbi.com/userfiles/file/78889336838.pdf
    • https://sibirprokat.ru/ckfinder/userfiles/files/popufoduzofe.pdf
    • http://zzquansu.cn/d/files/pemuxemirofelogete.pdf
    • http://mgrima.com/files/file/bazodinilu.pdf
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/fidozaxidin.pdf
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/judikeribaju.pdf
    • http://ramenhajimetustin.com/uploads/files/rezabijasebo.pdf
    • https://www.gurgy.net/ckfinder/userfiles/files/73361853258.pdf
    • https://hse.tw/upload/file/jojagutenen.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161408fc6b7dbc---sozezumowiworafatigo.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf1b8854d8---62869726284.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7fd61d1ef---82987667772.pdf
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sobijusuw.pdf
    • http://lesmashclub.com/imgUpload/files/82398052284.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=instagram%2B%2B+can+view+private+account
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da93.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA93 16792 bytes
font_01_sfnt_off0000f2a5.bin
182eb184d9e983debf1e2ebdd06f5830d0526f7cf309daf86c4f7aef9adc869c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A5 18168 bytes
font_02_sfnt_off00012192.bin
adf9f73a65d700395ac4cd21e26e5abc23fbf7e0905c3104a5624f59823e6e55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12192 10876 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.