Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f99b348ca9b6328…

MALICIOUS

PDF

77.3 KB Created: 2020-11-12 14:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 63a14cf437e36a6fb90762fa7b65b32d SHA-1: d69aa995651f6e49795dd44bf4eac67a3bca6767 SHA-256: 9f99b348ca9b6328de621a120cfba0367c70d58a3ed1960598d6a03e15d981ce
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/123?utm_term=combined+gas+law+worksheet+answers+with+work PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402932/normal_5f981eecbfe7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385437/normal_5f9c3e865387a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f87fd8702405.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/resixexi/the_smoothie_diet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/gasb_54_fund_balance_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/lebavurujorojipog.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/gomivilof.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/duzusipuzenulirapew.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/miboninividev.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/kugifeb.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_off0000dc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC49 5440 bytes
SHA-256: 3449868f93e5b6ed5f3b7f8c7400e7c7441b81f54fa47d23b73ae93467c18225
font_01_sfnt_off0000eea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA1 10288 bytes
SHA-256: 13438e81bcdb86fe9a834daecb96f18b50e3517c6b5f6a41511be2239ed57d18
font_02_sfnt_off0001120c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120C 16480 bytes
SHA-256: 596fa41a71207079eb122bf4c675271ae02a7b5291dc7c6cde2550049e03b0b7