Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb1f6753697e466…

MALICIOUS

PDF

66.5 KB Created: 2021-09-20 17:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 0e84e4a529fa6602116317e9f1c10705 SHA-1: 27c59bfe2ecad900556107cc536ea0eeffecbeaa SHA-256: eeb1f6753697e4669b113ba2b26307cecd37fcb12e8390554d473e409a6a7fd9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to websites that appear to be part of a link farm, with some hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The primary attack pattern involves luring users through these links, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8255

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 http://petgears.com/app/webroot/files/file/97898882338.pdf In PDF document text
    • http://playoz.com/ckfinder/userfiles/files/28933307848.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/30803786603.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210904_916B86D4E776D0B4.pdfIn PDF document text
    • http://hkacca.com/userfiles/xozon.pdfIn PDF document text
    • http://metall-press.ru/files/96986257450.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/tewin.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/37004382999.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e7a58b805---58608819207.pdfIn PDF document text
    • https://beautifulhairstore.com/upload/files/poguledumomokifud.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/jenodakabokojotojejofo.pdfIn PDF document text
    • https://xistenze.nagydavid.com/files/files/5970962526.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16146f633966e2---vakatipariwegususupab.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/zanejo.pdfIn PDF document text
    • http://navrattan.co/userfiles/file/85980455709.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/jujagosenukoga.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d31b579b9---xopufijufibi.pdfIn PDF document text
    • http://xn--80aafbladvtgxneccoge3bt.xn--p1ai/pict/file/76895036353.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135841875011---mijozukumeziwozadenob.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614392211c910---78852807673.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/27081653132.pdfIn PDF document text
    • https://gedayapi.com/userfiles/file/79090936616.pdfIn PDF document text
    • http://akekaluck.com/ckfinder/userfiles/files/wexifowuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=kml+viewer+online+freePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD532 18172 bytes
SHA-256: c60ebb09ba2d8407a069270aaca36790c89d27a1c2d637fcc50af00a8f65456e

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