Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f516958c1357aa…

MALICIOUS

PDF

64.0 KB Created: 2021-09-19 05:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 81dac7754f270ce7f749368877c25af1 SHA-1: af647854102b02ad1ec239c8e01faaf8256d749f SHA-256: 72f516958c1357aa36cc56eda1e31d57e27ad8ecb878035651ee76b087396f2c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ClamAV heuristic identifies it as a phishing trojan, indicating a malicious intent to redirect users to harmful content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3241

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=sita+ram+full+movie PDF link annotation
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/pelazefibewezuxozo.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/73044531831.pdfIn PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/vavepusonewipikejarawovep.pdfIn PDF document text
    • http://nprofit.hk/userfiles/40295857015.pdfIn PDF document text
    • http://paliukenas.lt/i/File/wulinowosanugunipezirasig.pdfIn PDF document text
    • http://gelinyuanyi.com/upload_fck/file/2021-9-3/20210903193012573142.pdfIn PDF document text
    • http://wakesup.org/userfiles/file/13329950188.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309eb87b2dc---susese.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/tibapezekoniwiv.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/45244787446.pdfIn PDF document text
    • https://nezamirekhaseafoods.com/userfiles/file/niroxinolekoxol.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/97938559242.pdfIn PDF document text
    • http://steinbach.casawell.tw/userfiles/file/pefazakesidikobelotexaf.pdfIn PDF document text
    • https://confidence-ist.mktechsol.com/ckfinder/userfiles/files/80379950304.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/31726377370.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/9337473262.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/tazosuluredegezagu.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/sawixo.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/64806580163.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/noxes.pdfIn PDF document text
    • http://asupuro.com/user_data/image/file/59718010027.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/35e63325c6b2ec308e9cc9cac8b41315/kebunikozokotu.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210905_92D42C24274143E5.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/zufipamuzewojoduxugu.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/rulivomubepazegipeb.pdfIn PDF document text
    • http://lagerunda.it/public/upload/file/dewufakureguso.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_off0000cdfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFD 10344 bytes
SHA-256: 41e38077ea772c56853c345c1f9406239546b2a020266e8d9917115d7e04a8c5
font_01_sfnt_off0000e56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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