Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c665985e084ce6…

MALICIOUS

PDF

80.4 KB Created: 2021-09-16 12:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 315dc8b4836b3632045709f2f7a27ea4 SHA-1: 660aeb716c1927c7b1fc368f4e2fbc10a2dc7c57 SHA-256: 24c665985e084ce63bc358b20a21bb5fb8c3ec0764914bb28d4e2eb478d59842
124 Risk Score

Malware Insights

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

This PDF file was detected as a phishing trojan by ClamAV. It contains numerous embedded URLs that act as a link farm, directing users to potentially malicious websites. The presence of these links and the detection signature suggest the file is intended to lure users into visiting compromised or malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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://inwebjor.ru/uplcv?utm_term=vellam+movie+watch+online PDF link annotation
    • http://brickchamber.com/ckfinder/userfiles/files/81601272742.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/a3edf952e9d3a4a36a36d0890d51c336/sifun.pdfIn PDF document text
    • https://solucionaesp.com/ckfinder/userfiles/files/lavotej.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1ad32977f---57165295067.pdfIn PDF document text
    • http://synphabase.ch/upload/file/pokusepujubulixisivetun.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/587ff30b58183c999cc40710a1a672fa/22127435816.pdfIn PDF document text
    • https://poulinstrapscan.com/userfiles/file/jonakukaxuj.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e64894f794---lugubuxixowabimilidid.pdfIn PDF document text
    • http://asia-test.informacittadino.net/media/files/41628418424.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/88828768528.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/gazageve.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/57747629517.pdfIn PDF document text
    • https://t-groupvnxkld.com/uploads/news_file/wasunobejode.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/29955367538.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/kusujafekaril.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/sesobixegijolupivoridege.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/161360d3418155---janopa.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/4634387331.pdfIn PDF document text
    • http://dar-tom.pl/userfiles/file/62475837496.pdfIn PDF document text
    • https://huanghecables.com/d/files/56611982159.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/99212611342.pdfIn PDF document text
    • http://poptheme.cn/uploadfile/files/20210906_164243.pdfIn PDF document text
    • http://daglichtfilters.nl/ckfinder/userfiles/files/51159772921.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/68187490944.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/22209303484.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_off0000f792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF792 17628 bytes
SHA-256: c3be7f2d855c62ffd8c555487bd0640092550b3d6f5ce2e0e3bdcdd42ad1b749
font_01_sfnt_off000124f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F7 10348 bytes
SHA-256: 16df6ed832fb20755a9e71ccdd8846597cb70073bafa87b15ccf35c14a77a7ae

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