Malicious PDF — malware analysis report

Static analysis result for SHA-256 7987b9967160dc7a…

MALICIOUS

PDF

75.4 KB Created: 2021-09-04 10:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 45ff9387fcd696748e125a20a1ebb9d1 SHA-1: f5679af09ae71b61309b939f16ab0dec739837bc SHA-256: 7987b9967160dc7a9815f9e446b0737b4aad46fcde0eb5992065c95b516f8956
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6688

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://huntic.ru/uplcv?utm_term=board+works+gcse+biology+homeostasis+worksheet+answers PDF link annotation
    • http://101-games.ru/images/uploads/files/47988478068.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/3ebd2fa3952867141446dab37aff5baf/59118241540.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c51811b8d50---58939280398.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/29424793757.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/fe824a9a2fa316c98b587e51dd792ec7/tidepejiseni.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/dtoclmhkqa2fsk1l5oc2niht7b/4405935813.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/wusagekeso.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b240ed5f9d---11541313361.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/110b2c8a5f7c6814421eeb8de95c60b4/kubelivekeza.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afd05d8c4ff---wubopamotajebuvaxetos.pdfIn PDF document text
    • http://webbuilders.com/files/file/nulodebavunalezovatet.pdfIn PDF document text
    • https://slide-bearing.com/d/files/tibugisulujapibixe.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/23390312984668262bd9eacc9f46811b/gopumowapavifiwakasezu.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/08b58257ace8f24f44d8875f406bf567/54085062208.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/37584588686.pdfIn PDF document text
    • http://corkpotters.com/images/musifadekip.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/kotozapuz.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/buzelivoma.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/tus5i3uo1g4p0e752805s8sj27/negafuronoketekarow.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8ae6506ec---rinosudavojazal.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/62783571394.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/paduxep.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0cc17f436ec0b5c4050f5a96a61deba/43023732683.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/9929f8c3119d1ae4bb2e19d9e213f8b4/28316958607.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/75635990682.pdfIn PDF document text
    • 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_off0000f46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 11300 bytes
SHA-256: 0f444484cbea2d1dcfbca7cc4eb8fcc08afd774f80c5eb319948ae4985523bc6