Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a776e86e61895b4…

MALICIOUS

PDF

171.9 KB Created: 2021-07-01 15:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 067e510c500b791da7bca1551f2ae9f6 SHA-1: c6f0b614fc9c6fe685adc34110be78708c89677f SHA-256: 5a776e86e61895b48ec699cf9a68a8169731a0d87ef3de532bf1f35340267026
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting sites. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6979

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://talk200.com/admin/admin/uploadfiles/file/79538696943.pdf In PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210618023200.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/tiluzo.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/fujinulutotuxosusize.pdfIn PDF document text
    • https://kopari.hu/files/file/zabivulodaxizi.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/7e3812f93edb83cd0c93b14741a4effa/47657191240.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c51e5e940ab---wilunogaxojavaselikopi.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/kunuvi.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/21557401143.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/sopul.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05ce148802---78087364600.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/2232640015.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/71027268889.pdfIn PDF document text
    • https://hissekurban.com/resimler/files/kukiporisivemepumegofave.pdfIn PDF document text
    • http://leakefamilyreunion.com/clients/63964/File/mezodonakepowukidapova.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/59049435255.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/5c406d2f64a11d1b59a84ef93fa40c7a/pamefotuvumomuto.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/qtog486nf10budpdvch5ukcv95/towadenimuxujedokumasaxog.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/bki31dvd9cuh675bmosoresvsp/gojutezawoz.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/zokosuzida.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/4973266897.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/rexewozujinajotefogaj.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae372cb0d8---12517724022.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fa533d617---bixusigunek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=such+as+inPDF 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_off000285c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x285C7 18264 bytes
SHA-256: 2fcc4bdcaa004759cc207a3f13a9f1028f2eb32f5bd87789e444f8a64bffdc95

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