Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff014e9e7907cc0…

MALICIOUS

PDF

73.8 KB Created: 2021-09-14 01:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1f35140c8b3b116ada309cb98b65c849 SHA-1: 9fb32261d96ec87b2ef81bcffbc4d32807da94bc SHA-256: 7ff014e9e7907cc01dcf855e0a5b99fda384c158fd1d258a3095a3565455db87
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. The presence of external URIs and link farm characteristics suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8647

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=edit+website+apk PDF link annotation
    • http://egitara.com/upfiles/files/26001862564.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/josexuxozesebulonisi.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca972486b0---xiwodudujodagezoxedunawik.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/96774767489.pdfIn PDF document text
    • http://tongrentangthai.com/UserFiles/file/47973226760.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/pukujubaligalipolidajax.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/57413747057.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dusudobemetafa.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/jutejupinikasalibesuwave.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16137a130c2ea6---79408604614.pdfIn PDF document text
    • http://lovesenergy.com/file/givegewerosipox.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/zujufalo.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/49097232142.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/41886370809.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/rewewotek.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/17444311587.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/91362926875.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/71740920731.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/kasexagizexadojivuvasif.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/60348346017.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/81591115514.pdfIn PDF document text
    • https://gsm.company/ckfinder/userfiles/files/sekusariruzobizisafogu.pdfIn PDF document text
    • http://bananamusic.tw/uploads/files/202109022015599525.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/jokutemij.pdfIn PDF document text
    • http://support-cmu.com/filedata/file/jinubulelas.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_off0000e37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37A 10316 bytes
SHA-256: 310e88367186ae25eadc72b270cc1b5956b5fa2b88f83000f36ccb1e83bbb4da
font_01_sfnt_off0000faad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAD 18240 bytes
SHA-256: 0b663a51ee8376a50d52bda47e092fe7bbe429e7d13579e5dc189f1b12a49a94