Malicious PDF — malware analysis report

Static analysis result for SHA-256 9210b2918bbd33db…

MALICIOUS

PDF

79.7 KB Created: 2021-09-16 08:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ff5dade879707f29829a23d02118bb84 SHA-1: 4489482e7efc10d05073db8a98f8d805f84b7021 SHA-256: 9210b2918bbd33db396c558f6b1d4abfaae572aa58cef929346eddf50f9a2af0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. It also includes numerous external URIs, many of which are part of a link farm on disposable hosting, suggesting a phishing or credential harvesting attempt. The presence of embedded JavaScript indicates potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://synerhu.ru/uplcv?utm_term=receive+data+from+old+phone PDF link annotation
    • https://myagenda.myagenda.cz/pictures/editor/files/19735662955.pdfIn PDF document text
    • https://www.thic.net/plugin/ce1/ckfinder/userfiles/files/41363009728.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/93482562543.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/wadum.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/dijase.pdfIn PDF document text
    • https://nikunjfoundation.org/ckfinder/userfiles/files/pisobokesetuzesiwibopukik.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/fuguzufenegidos.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/73765204587.pdfIn PDF document text
    • https://letajicikoberce.cz/userfiles/file/72237893268.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/satovajuxalunepexofej.pdfIn PDF document text
    • http://chetaomaynganhnhua.com/uploads/files/7635565000.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/90773582637.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/kewakejalewera.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/zatetirusurekebafaserexiw.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/45132025581.pdfIn PDF document text
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/wafonofarafuzejixumemifi.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/64717929916.pdfIn PDF document text
    • https://on-call-anatomist.org/ckfinder/userfiles/files/75021221737.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/99225054153.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/dsp2hps50r3jujq5g5jdhlovd1/vibukizexedebutapurugip.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/bapesu.pdfIn PDF document text
    • http://faradbox.pl/files/file/15566415804.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000d41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41A 17256 bytes
SHA-256: f96c2a24617ac126778e46903efb75a3ef1f76dfa62cd5e319b9334b84f3a0e4
font_01_sfnt_off000100af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AF 10828 bytes
SHA-256: 52e95b32707bc7c99b487d58d6b1d0e0985506492fc00ce58eb8b8aa01adc490
font_02_sfnt_off00011978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11978 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.