Malicious PDF — malware analysis report

Static analysis result for SHA-256 7392119a2d83f914…

MALICIOUS

PDF

79.0 KB Created: 2021-09-16 12:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: fc0bb4dcf50589f773e6aa36be034ffa SHA-1: 8445326ecad4024654d928b41f7c5343baf18e88 SHA-256: 7392119a2d83f914309f35acf80e84c723e42ccc5d3976e6c2583716f2a5c066
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. Heuristics reveal it functions as a link farm, directing users to multiple external websites, including compromised WordPress uploads. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5306

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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