Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b172e1ffc2cc478…

MALICIOUS

PDF

72.8 KB Created: 2021-01-02 12:29:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 28b270b2be48017c2d068b5c8d8f3bb8 SHA-1: 7e19c3eb14666babb72c5e10d12a76af3e17e75e SHA-256: 8b172e1ffc2cc47867b86e42475aa4eb7923eeff6deb97c4e997f73da2c20ad3
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URL that leads to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, appears to contain metadata related to its creation, including the URL itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafficel.ru/123?utm_term=carry+me+home+lyrics+atmosphere PDF link annotation
    • https://cdn.sqhk.co/bililusele/gjfJEhh/how_to_speak_fluent_english_without_hesitation.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/b4jiHgf/your_texas_benefits_login_help.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebevon/gnahaig/ara_pacis_storia_dell_arte.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojijejip/RP3gggf/kajojuve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496380/normal_5fc621ce2e66c.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/bexolamabad/famewur.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/clueless_watch_online_123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5aa145-b7e9-454d-be2a-3a33fa483dd5/suxid.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/marvel_intro_after_effects_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0bfcca3-a5e2-4e58-8039-bae7e36c8164/fekiruratiperonu.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_off0000cc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC21 5180 bytes
SHA-256: e6d189dd32bc80ef4fce3b99adaae7c4eebaad9711377eb3b71924a26e20bbef
font_01_sfnt_off0000dd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD99 10272 bytes
SHA-256: bdf13dd5859862a3fbe37c17dde8ec9e12115586ced79c5d178d16f4bdee39fc
font_02_sfnt_off000100f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F5 16160 bytes
SHA-256: 7e63eb3bed9c4ceaf47e86587cf77a789dba98dd2b4db382f0c7f052a0aeb8ce