Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc012b789f8ec890…

MALICIOUS

PDF

64.0 KB Created: 2021-09-20 12:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: fbf691c64c63162cbfab2a3980d76244 SHA-1: c7c4edabf37b705a8ab5dbfdf93a6a11fc22cd41 SHA-256: bc012b789f8ec89097618d73afbf7ea993ecc40d1b8fa3865ddfdeb4c23095cd
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains a large number of embedded URLs, many of which are on disposable domains and utilize UTM parameters, suggesting a link farm designed to redirect users to potentially malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7095

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=watch+crocodile+dundee+online+free+putlockers PDF link annotation
    • http://www.cafeinca.com/img/public/contenido/file/44928373654.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/44003287362.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/fufubesakipirupuxutunuv.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/69307084611.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/82001449912.pdfIn PDF document text
    • https://egc.ecrom.work/syo/files/jibejukumuxometevo.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/32943166665.pdfIn PDF document text
    • http://tele-fonika.pl/upload/file/39952764702.pdfIn PDF document text
    • http://nb-magnet.com/upload/files/novavugup.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/kifarufojijuso.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/2824315922.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/49086469342.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/5203380642.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/67916151033.pdfIn PDF document text
    • https://full-e.com/app/webroot/userfiles/files/20210920_143508.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/doxobuwujutebitu.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff62c3df28---52403016186.pdfIn PDF document text
    • http://safarang.com/basefile/files/muzimozumopexaxitajabepif.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/pidino.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/89024284260.pdfIn PDF document text
    • http://ageddfjtj.pretty-match.com/upload/files/76392735407.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/80282745911.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/88532674395.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161469b7fab5a3---19192616695.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/29003576539.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_off0000d544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD544 10900 bytes
SHA-256: 3522a7157d13731ae83dd0d14da188fa430d3ab3cbb4d6017e92ba9bc4e9c03a

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