Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c367735b7f0203…

MALICIOUS

PDF

63.7 KB Created: 2021-09-28 10:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a9fe7d841bb3712369f8a773c6fb25d0 SHA-1: 06832e430cefb28a57d56bf50c5f134d2c7531ff SHA-256: 68c367735b7f0203a9c3d016626eea9f11d41a60902028dd8015d3db17c3860a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous external links, many pointing to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, further supporting its malicious nature. The presence of these links suggests the document is intended to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4699

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/uplcv?utm_term=watch+dogs+2+game+for+android PDF link annotation
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/4953f953b6ea0f497f886890aa5e3231/vovoboxuxiruna.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614bf12d31e28---rafimilonexutanij.pdfIn PDF document text
    • https://geloracinta.com/contents/files/45852560580.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/limakogevifejipuzig.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/xuruvulowalat.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/76027805732.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/71198512998.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/49765330581.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16135983911294---48935629685.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210926_6A1E3CE2DED7A304.pdfIn PDF document text
    • http://hardiebase.com/uploads/assets/filefile/zopenop.pdfIn PDF document text
    • https://nsstore.mx/ckeditor/ckfinder/archivossubidos/files/gatezapedokadasamuzoxo.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/zenorojajeraxodasafopuk.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/gatexenezu.pdfIn PDF document text
    • http://grandfiltr.com/files/file/wodorasumijerasen.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/zoteluwuvu.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/4m584jasvele8fanmnrtpdenm3/83054612958.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/wemevufedikigarudegilasur.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/3753959643.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210923170051.pdfIn PDF document text
    • http://becucci.it/userfiles/files/pofumuxejerotopovonij.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/wogukawitoxorolarese.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/95171514964.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/897f653d1cb1c06f9855eea9ac87a997/18480573932.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/49726488612.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/3328541018.pdfIn PDF document text
    • http://vigova.com/Images_upload/files/nepotidebegutij.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_off0000b8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B5 16688 bytes
SHA-256: 1d3bca571a4cd475be1354d2ebd084aa5ea46d4a04f46fc5b19c7cf57c3700e8
font_01_sfnt_off0000e353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE353 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1