Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68984e5707352fe…

MALICIOUS

PDF

86.8 KB Created: 2021-08-08 00:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aa97b1c11ce4b02e91f57dcf87464318 SHA-1: d2def65e12460c5d4afb09ea18fcd03ff2568fec SHA-256: e68984e5707352fe7e11d01eb9652c5a7d13cf618258647332217e32ee3d2eed
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised websites and potentially malicious PDF files. These links are likely intended to lure users into downloading further malware or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8543

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.contectrade.hu/fckfiles/file/lasuxasulukonatarumu.pdf In PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/47326798581.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/3f3dbd0f91acdb6c986d45c603092c05/gujavosizevuzovubogorixan.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8963b9766---13701201541.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/9961868377.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/0eilik1meevriff0untpuv0od7/waxovigovabul.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/95806013505.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5daeb81046---wagedej.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/pujulijoxizibifakepodi.pdfIn PDF document text
    • http://reikihaus.com/clients/75291/File/27846409401.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/19347500399.pdfIn PDF document text
    • https://klairtransport.com/uploads/files/969699923.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/3731b05cadce60f5d1c89f30855c8d15/tibiniwutiwafebo.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/u3h0j6behhh9p4292cb6f83pl0/11157238925.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e50e213f0e---kuxonekif.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16079b662e50c7---mewowilamosiselobazuxo.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/10a9014ec25ecf7f55d0ec1bf4a782af/sojowetonaradamifuw.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd78b80afb---35264636958.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/68026798060.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/c4505243c02c05613f1716b8dc419474/75445380177.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c46d98a1765---tokegurodite.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/76977111140.pdfIn PDF document text
    • http://accronline.com/userfiles/file/72474811406.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/50956582180.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=ejercicios+de+acentuacion+de+palabras+agudas+llanas+y+esdrujulas+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FF 16352 bytes
SHA-256: 9d2de4096f9238ad2bdea75a2616415385909a5e4ed5cbb6c1c3143dca581313
font_02_sfnt_off00011d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4D 11260 bytes
SHA-256: aeaf74f41ff22bb93ad487c19b34a80b2ef9673dcb6d11f5a798086923d6d05a