Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfee4a1f72d1f59…

MALICIOUS

PDF

71.4 KB Created: 2020-11-25 00:06:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e83a39279e2e0aac4f4a8e8da6d9b189 SHA-1: ea24e38c42797ecf1ba14c3e64725e2cb79b3155 SHA-256: fcfee4a1f72d1f594f83e476a6e22d17d4e31e0143dc6d3bc956bf5c847f198f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading further malicious content or visiting a phishing page. The document body, though heavily obfuscated, contains text related to 'Brihaspati chalisa pdf' and the authoring application 'wkhtmltopdf', suggesting a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/aws?utm_term=brihaspati+chalisa+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5f91a17686129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472753/normal_5faada31b8d2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5f8c66e4e9380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5f8d82ad43e25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5fafdb3972976.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/falufusu/sleeping_barber_problem_program.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/furowofuvufezek.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/13896274146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4bd521-e045-4749-af53-eb329afe3e8c/wulore.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/siburunudulugobowelowabuk.pdfIn PDF document text
    • https://s3.amazonaws.com/pusumowi/lurixomi.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_off0000c5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FC 5292 bytes
SHA-256: 2be7132164dc87f36f562c1535fce94cd90613360dd0f0210552f8985574eef5
font_01_sfnt_off0000d7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F6 10488 bytes
SHA-256: 8628f1e4e8bc8b3a290845c8b524984b3c91ce244e39c99253a922a15bcb8900
font_02_sfnt_off0000fbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE9 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e