Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a96182c33e44bb2…

MALICIOUS

PDF

111.0 KB Created: 2021-09-04 00:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: dea09a40958e3805a22ae4e66240eba8 SHA-1: 19e55e485c370dfedda45894248b0f1adc4c2607 SHA-256: 4a96182c33e44bb2d56e55adc17873a77bfa6c644f9ee50dd44c92ebec1ed79d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also exhibits characteristics of a link farm, with numerous URLs pointing to external resources, some hosted on potentially compromised sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5991

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://koreanhotpot.com/uploads/files/7218374209.pdf In PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092b9be53379---29103740029.pdfIn PDF document text
    • https://appfacile.it/file/45865610601.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/digifarofegomaxewasigug.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/83215501243.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/77752444699.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/63848061b9759f6cd790c293aded5d3d/27811913990.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/69355505122.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/jaluzipi.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb8f6b8d18a---dupatomojabumefatagidufew.pdfIn PDF document text
    • https://123natura.com/stockages/files/77648130513.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/90667215803.pdfIn PDF document text
    • http://www.flamanville-76.fr/upload/file/bemerixuxunami.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/51571163163.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d3a2d681e48---pesesatoje.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16091a7c9599c7---gajokuki.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/bebabajevokufipiru.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/46e666948bbb27c09e40833f62f819ec/20343289849.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/pixapu.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/15909882620.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/rimetek.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f3886fbc77e---monomomezelawabifa.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/rozimurafo.pdfIn PDF document text
    • http://saydersan.com/firma/files/73100549923.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=philips+tv+owners+manualPDF 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_off0001809f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1809F 21100 bytes
SHA-256: cecd51255083bd0f3dff161f43c2855d4a1f7e428594cd4b8e376590fc7d671a

Open this report in the interactive analyzer, or submit your own file for analysis.