Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffa966920888c80…

MALICIOUS

PDF

93.0 KB Created: 2021-04-15 08:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5450ed86958efce58e9110606bb9605b SHA-1: a18f2addce8d0a051a39fd49f35b53602c81d076 SHA-256: 7ffa966920888c8030e2027931a3f3e955b3689eeaed52f6458d6678a2df88d5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to 'zajinet.ru', which is likely part of a phishing or malware distribution scheme. The document body is heavily obfuscated, but the presence of external URLs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=no+fear+shakespeare+othello+act+2+summary PDF link annotation
    • http://bighome.space/880583734651iziw.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/cb9a4c.pdfIn PDF document text
    • http://electorat.org/public_relations_definitiondc6wj.pdfIn PDF document text
    • https://cdn.sqhk.co/wejideduv/ihajpgd/lego_jurassic_world_ios_dilophosaurus.pdfIn PDF document text
    • http://getyourscore.info/schwinn_discover_hybrid_bike_walmart39dlv.pdfIn PDF document text
    • http://reduslim-ordina.site/rixozhegt7.pdfIn PDF document text
    • http://changepass.online/54869240307cc7db.pdfIn PDF document text
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/83e83f67bf2.pdfIn PDF document text
    • https://gogesatita.weebly.com/uploads/1/3/4/3/134321397/watajitaniweziz_mevop.pdfIn PDF document text
    • https://nopubogap.weebly.com/uploads/1/3/4/6/134667077/0f2dea82.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://wowajonaj.weebly.com/uploads/1/3/4/7/134717857/nasonotike.pdfIn PDF document text
    • http://visionnew.xyz/average_salary_uk_security_systems_engineerf4ca1.pdfIn PDF document text
    • https://sekorora.weebly.com/uploads/1/3/4/8/134856449/6737233.pdfIn PDF document text
    • http://trysalon.xyz/duravoghq4nb.pdfIn PDF document text
    • https://ribarifi.weebly.com/uploads/1/3/4/2/134266405/vepatorame_nosuvatikevid.pdfIn PDF document text
    • https://wajifisawebe.weebly.com/uploads/1/3/4/4/134480175/4831396.pdfIn PDF document text
    • https://cdn.sqhk.co/bodujemep/hJWJidu/16997067290.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/hbAghgi/2272198074.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/belitinesozifotenumalixo.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/67509337060.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/fusidosukazuv.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/xakasoriwepetefeferubud.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/learn_to_do_eyelash_extensions_ottawa.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://scripts.sil.org/OFLIn 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_off00011820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11820 5524 bytes
SHA-256: 61e3c077255d558f375fd13b62d7945d720b14d2fa949e896d2bf2be665ac78f
font_01_sfnt_off00012ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD3 10632 bytes
SHA-256: 6c5551d119893edbbee40ab7ab0f7cedf445fa75b021dd342b162d3ba3310f7d
font_02_sfnt_off00014f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F23 16192 bytes
SHA-256: 049c95b492f20458bd7502adbc9b17c6b16b8bbb75656374a3d2707401431498

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