Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b68c3bd1206b0f…

MALICIOUS

PDF

76.0 KB Created: 2021-02-25 19:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6a4cbb9c3fb40c4da39277e94b137b2f SHA-1: 71e6c47b885af44d7c54c7414228382f205f0d1b SHA-256: e7b68c3bd1206b0fb4bc878e7eda5a72f378dacdda9470d99cdd21eb2ed44109
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, one of which, 'https://leonvi.ru/strik?utm_term=sbarro+pepperoni+pizza+calories', appears to be a lure. The document body, though heavily obfuscated, suggests a deceptive pretext related to pizza calories, likely to trick users into visiting the malicious URL. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=sbarro+pepperoni+pizza+calories PDF link annotation
    • https://cdn.sqhk.co/nixenexax/0ifibAI/37657165816.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/dhaipha/fanewugiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/dejijadu/TQl9ie4/dutudibeloxesibero.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/wicW5ge/murder_hornet_stings_man.pdfIn PDF document text
    • http://cardioactiveuficiale.site/edexcel_a_level_economics_textbook_answersg0eee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_6036a0d0d3eac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488574/normal_5fc6d15d3220b.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/tifyifD/free_robux_app_for_roblox.pdfIn PDF document text
    • http://bit7.top/cop_stop_crowd_controls6mq5p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423430/normal_5fe90b5f90456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467612/normal_600e49982bbb6.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/ljgFjcL/minecraft_pocket_edition_pc_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/icDWbii/feist_1234_video_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/hiRgf99/geek_shop_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449968/normal_6000e98e6b42a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_5fe6f4dbe29b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469836/normal_600ebc212794f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6E 4928 bytes
SHA-256: f7473e8cd2de6f38291be4c4b65377e212c337c09d1f487930ceb02b4b1748d5
font_01_sfnt_off0000f025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF025 10748 bytes
SHA-256: 80c3066a675bcf7ed233bebb86a0972f5552aac0e06a248b1edb752fb1452d0a
font_02_sfnt_off0001149c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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