Malicious PDF — malware analysis report

Static analysis result for SHA-256 7889d8fac5102a9b…

MALICIOUS

PDF

62.5 KB Created: 2021-09-25 00:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e160e239cdb9b158000edcc72ee0d34d SHA-1: 429122064d90ef254b5bf6198f1be7d53febf98c SHA-256: 7889d8fac5102a9b19371dec97fe29c51417161e54eb29aeff054b16f21907d5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs that form a link farm, many pointing to suspicious domains, suggesting an attempt to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the phishing and link farm nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6561

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 http://efeteknikyapi.com/userfiles/files/68302670005.pdf
    • https://giltmorestukko.hu/ckfinder/userfiles/files/81045708119.pdf
    • https://mayersoffice.com/userfiles/file/5937728774.pdf
    • http://aotwcasino.com/ckfinder/userfiles/files/91428907668.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139977b2e833---kepuxefesovugoviroku.pdf
    • https://telorgabus.com/contents/files/posalanopebidapej.pdf
    • https://silky.ae/images/bulk_images/files/xodijepabotumexisenulamo.pdf
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/nofomufu.pdf
    • http://darangyi.com/userData/board/file/10162823817.pdf
    • https://nonbodepsg.com/uploads/files/91192184241.pdf
    • https://tainandentist.com/uploads/files/202109030246138439.pdf
    • https://mwasafat.com/uploads/files/88555572125.pdf
    • http://palestraarkadia.it/userfiles/files/bukezogagudevurisukasatad.pdf
    • http://wyadonline.com/userfiles/file/gikejovu.pdf
    • http://milkyway-vn.com/upload/files/32962705938.pdf
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/gabapajopotodejidujirig.pdf
    • http://augustaelectricalwork.com/editorData/file/lukesu.pdf
    • http://ecofincas.net/ckfinder/userfiles/files/65513457678.pdf
    • https://tch.lu/files/files/56613235247.pdf
    • http://straps.by/ckfinder/userfiles/files/91378371062.pdf
    • https://nmg.lv/img/uploads/files/fizilax.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=office+crack+2019
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac29.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC29 16792 bytes
font_01_sfnt_off0000c440.bin
3973ef4d2feceda20447ca757f5a1419c55d431ee6d4c2fa4e3d34ebaafde167
pdf-font-stream PDF embedded font (sfnt) at offset 0xC440 10372 bytes