Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1bfe1fe5141402…

MALICIOUS

PDF

73.4 KB Created: 2021-07-24 19:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 45ae97c21f3cbc9beda81cf338c23a1e SHA-1: 0aadcf8ee6d3f7522876f6f69c65403a478e3f3b SHA-256: fa1bfe1fe5141402628eaac2b518dafba94a8283ab9aa83cdf9f17cd8a97d0b0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute other malicious files. The presence of external URI heuristics and link farm indicators points towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9372

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 https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/33c2bfe40d57f60b1e3d5f4690357688/15545556769.pdf In PDF document text
    • http://fobas.cz/userfiles/file/bigufikuboponasusowilu.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/96843554959.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608097d9d5656---sanapebugigumot.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160abf4e62eeff---21235007639.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de8d4aad78---90309252776.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4348533623b985e580d5ddd65d09cc84/18482768423.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/fogejuganinibusi.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc4b444f34---51521970666.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/5eb2318d33fa68c6628c91a74320941e/voberimurimemitumitij.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//fireribetizazurisew.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/miliporezode.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607933b08f03a---rifetaketufax.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/pseo3tl861jpdp5uo5v294ecr1/dajikewowafimox.pdfIn PDF document text
    • http://ledins.lv/cms/file/35969319157.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608549657501d---gavewekotudu.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/vu4ut3ht4vmevgsre43co06pea/48355383808.pdfIn PDF document text
    • http://baovevietnam-vnss.com/upload/file/renesolimal.pdfIn PDF document text
    • http://12shio5.com/contents//files/89879074073.pdfIn PDF document text
    • https://egf.tw/test2/images/file/46528365628.pdfIn PDF document text
    • http://gloexdr.com/wp-content/plugins/super-forms/uploads/php/files/a999fca525c42ef43372f66c49a3a139/juladerukopepasomorivep.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608370676b499---29425288807.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=stickman+soccer+2018+mod+apk+all+unlockedPDF 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_off0000ef77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF77 18372 bytes
SHA-256: 75168e3c1d4bdc108399397362da60778c3950a323e2da50abd9b42c97dfc468

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