Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9a2394fae5dabf…

MALICIOUS

PDF

85.9 KB Created: 2021-07-26 14:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6f3e69d5aed07a104711e5d2efecc707 SHA-1: 7863f744d83674e8c74063fa29ff48482756f6d8 SHA-256: 5f9a2394fae5dabf29533f1584f7fbe55e61d660124db422e605adb2eff75e17
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or conduct phishing. The presence of external URIs and link farms indicates a likely attempt to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5823

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1337cdf7c---wesux.pdf In PDF document text
    • https://gsacademy.ge/uploads/files/jizelodur.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/ragotejuluzojurobab.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/663f19a4e1b3a3c4ce98e1f135b66687/petulexixemixufivalu.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/uk9hj64ork8e5kgupv9sv3s1k5/36855931514.pdfIn PDF document text
    • https://parkettworld.com/upload/files/4485756402.pdfIn PDF document text
    • http://focostrade.com/files/20210622204902.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9b5c50748---90557304045.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/46226a3a902adc0560dc5d953ea76e9e/5449811777.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/28778495462.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/rftm7kuu3nla92vt9jhegvluj0/71916972553.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/9355b37f15af6b921f1f0b27c6cb6b6c/77611801483.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/notemezozi.pdfIn PDF document text
    • https://davaocarrental.com/images/file/vavikefemadimi.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160893e65c5ae4---lufojotole.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608aae36d00b8---12269141476.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a8881114196---kamomiwuzogavitaruwimil.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/64669236338.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608680ccae9a3---45903406322.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc66a094e2e---vosawijowivofazele.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/720de0dfb90b3990780ba4626a7f6833/543200421.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b918bbc8d10---61179771368.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ce4e05d81---16245302229.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef8bb2e51b---82598803763.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+much+money+do+pilots+make+per+hourPDF 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_off00012208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12208 11160 bytes
SHA-256: 8da74f944b5b2910dd324e55ee4ce523283c4d14decffbc29c13d7c49e35ade5