Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f5d73f2dffd7761…

MALICIOUS

PDF

89.5 KB Created: 2021-09-19 00:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f902b141f99df8d49d4fd75579116787 SHA-1: b0edb824d5b120dccf8afb803d5121d26f1ab5b0 SHA-256: 5f5d73f2dffd776121ce78b3b2d0343aa9da9e0fbff17650cf34eed91aa43e39
102 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV, containing embedded JavaScript and numerous external URIs. These URIs, such as 'https://crysiq.ru/uplcv?utm_term=taken+1+full+movie+free+download', are likely used to redirect the user to phishing sites or download further malicious content. The PDF structure and the presence of JavaScript suggest an attempt to exploit vulnerabilities or trick the user into executing malicious code.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3893

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
  • 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://crysiq.ru/uplcv?utm_term=taken+1+full+movie+free+download PDF link annotation
    • http://skrabl.pl/www/rpbd/fck/file/guwuj.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/malorizopivadi.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/97664483439.pdfIn PDF document text
    • http://balbu.hu/uploads/news/file/98063930996.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/kixolo.pdfIn PDF document text
    • https://ijp2.com/contents/files/99679454998.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/pujepebabubivazimedodofu.pdfIn PDF document text
    • http://npk-bypassdrr2.com/file_media/file_image/file/21345500486.pdfIn PDF document text
    • http://minhquoc.vn/ckfinder/userfiles/files/74578625047.pdfIn PDF document text
    • https://caraudioshop.ro/mm/file/66037984744.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326aee6f63a---luxigodurusanuzupogixit.pdfIn PDF document text
    • http://stroytehcentr.ru/images/file/fajawokakixudojatib.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/33000102646.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/beroja.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/56531613750.pdfIn PDF document text
    • http://professional-tuner.at/uploaded/file/bavitivutunozip.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/dadopimaboz.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/jipakemumuxajoxejelasome.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/mb2gi4jrttm2jvm3fhni5ie4r7/97948066262.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/bozagewugobowitavudimovek.pdfIn PDF document text
    • http://traiteurluc.com/userfiles/file/5594312892.pdfIn PDF document text
    • https://hoalavender.net/upload/files/vivomowosexuzabapopa.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/28697739400.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000121ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CA 10608 bytes
SHA-256: 13bf44550a42728bc58ab0dcd6d45503524014c722a0df2af32113812d399179
font_02_sfnt_off00013a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A11 17652 bytes
SHA-256: 4f923d419c7861c3eadd8fb8962ae61ee205fb9b13d9452249831fa22fd01725

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