Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f58ae97a015901…

MALICIOUS

PDF

79.7 KB Created: 2021-07-02 10:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 750cf55788a1df3ffffe81e12eaa5bc4 SHA-1: 8cf3a22e117fc479a1cc9797f3005bad2ae7fd89 SHA-256: c4f58ae97a015901639f65a721033e9a3979e0608917786b91b7e7f9c99bf399
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • 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.
  • 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://wastran.ru/uplcv?utm_term=gta+vice+city+full+version+free+download+for+windows+7 PDF link annotation
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c503c814038---93921239732.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808f528f2ca---kexejusevunego.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6b442fbdb---8416606235.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/wilupuramufiverupona.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f78f53b8da---perikoju.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/veleris.pdfIn PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/kipebopatawusitaju.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/cbae9ccfa206cb6a0d73c284ff02d7d9/30977749577.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160dade51833e8---66800100110.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091abd8edde3---gipelirevarabemijedupulun.pdfIn PDF document text
    • http://vinmexindia.com/uploads/momaxapefan.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16097c96090c3d---93856858756.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/51259693523.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/rebagaxexarubudewikuxa.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/12864737650.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/98051607589.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/160879957c445c---jajakinofobapodimunepidul.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/83304435470.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/f0e396b4903bc9a9aee7476237d5e1e8/kotubipaxuvowa.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160866da1cee80---wawataxiv.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/roladazigosukide.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4db1c0ea3a---kebikiluguxezet.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/ecc61e8584c28adbee3268c813221a47/lelimudotinevidipifowudur.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_off0000f65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65B 17100 bytes
SHA-256: 6dc0f1139ef1e5f7fff3a5bc02bc433474dfb96368101081cf0769d618e946db
font_01_sfnt_off0001227f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227F 10924 bytes
SHA-256: c02cfff2fd3703cda1c7b8911bc525ae1304ab5da3e10726cade8d57642135e2