Malicious PDF — malware analysis report

Static analysis result for SHA-256 104890ee8901c773…

MALICIOUS

PDF

60.9 KB Created: 2021-09-16 16:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 8736a517b500d4b30596cdd4c9e5e52f SHA-1: cf37808179c549cd6a8ee4edbd26f3bde994127a SHA-256: 104890ee8901c7730a1ef6404f23f5ffccda9d93680870285e8f711f378a76ac
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The document body, though heavily obfuscated, originates from wkhtmltopdf, indicating it was likely generated programmatically to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5364

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://pixomot.ru/uplcv?utm_term=omnisd+download+jio+phone+apk PDF link annotation
    • http://minhledtran.com/luutru/files/tirefogewumogusinapoloba.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/xigepanevuzo.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/67172761539.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/38334938024.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/92681535715.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/liduxafavopagobosexup.pdfIn PDF document text
    • https://btegypt.com/file/5883148834.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/42809008573.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/lemidipalejokilinotan.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16140bcfe65392---80096268542.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/bomijezotuwazetefuba.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/91622542620.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/87150369209.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/kalagesumeral.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/nixogegorivibunakodepepub.pdfIn PDF document text
    • http://nwatchonline.com/userfiles/file/87355473957.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/43578842399.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/roxol.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///kunetobenutinufubeg.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/8894420547.pdfIn PDF document text
    • http://cx-gl.hu/images/files/31029378139.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/55760552380.pdfIn PDF document text
    • https://insp.biz/img/file/jusufikotamazulugerim.pdfIn PDF document text
    • https://senegal4d.com/contents/files/firirikuxewevilewopi.pdfIn PDF document text
    • 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_off0000bf1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1F 10792 bytes
SHA-256: f2b4f794ba33e78fe24744c1eec302f847aa27cce2a7f16b88fe867348c905ec
font_01_sfnt_off0000d7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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