Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8962ab176c73ed…

MALICIOUS

PDF

70.7 KB Created: 2021-09-04 22:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8e074e7d147ed259e344597d1040d32c SHA-1: f6a9e63f581a65261a7b6cb8fa8ae25ea174bc72 SHA-256: dd8962ab176c73ed6759e8a13738c092cd3f396a27e6a52e42eb2c70aef9ed9b
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs and link farm structure are indicative of an attempt to lure users to malicious sites, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8295

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://pjteam.hu/uploads/88788833115.pdf In PDF document text
    • http://kasystemofkarate.com/clients/861259/File/nugutoxivatige.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f17f784c6ea---24638120184.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/u2l35cg99ns0i55bh6hgfcq6gq/92843210207.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/48681326525.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/8pdf8vrpoubslr5a7ejjvu0dq9/29911783779.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/8afa968df88aff44dda58b795f5d78ee/55730580142.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/63192751971.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/95b29e1f098099dd96b11c51b7ce0426/nitogomunevosuzilok.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/95991019456.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/c51e0c80fd5357d1b5a8cd44de0a136d/86913106468.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/vabovasufegepoxuxalon.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/12297563206.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/6582f332fd3b0735f4ada57992f34c01/60900469631.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/vomof.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/e02d627ffdce1aec9c28feb895eefc84/sumozopujetiwa.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/c055bfahblte29sfd3hr681fre/bimejok.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/baxoxivizexafutotuduz.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/445e9f9cab6d5d6588cba951045a7cd4/15728794764.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/83375564449.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a288e151750---jetazefa.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/46ccc1ef642b45998e23dc5627f4047d/46845786636.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160987f1bdc249---65858051675.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=intoxica%C3%A7%C3%A3o+por+solventes+organicos+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90C 11376 bytes
SHA-256: 1010326dfed203d395e275669bb5c8175bb2d94e6c83023ede0b080b2b0b5447