Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39124fbe1e32b47…

MALICIOUS

PDF

74.5 KB Created: 2021-02-16 05:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 05f7f1828ad5aaf0aa671e6380e3f4f3 SHA-1: 760cd512a4b5a3e488e43eebc71da65ec1317914 SHA-256: b39124fbe1e32b47411d30273ff7836884c8a7c51d340fb5034b520cb7266d89
154 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The embedded URL, 'https://crophysi.ru/wix?keyword=wifi+code+breaker+apk', is designed to lure users with the promise of a 'wifi code breaker apk'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=wifi+code+breaker+apk In PDF document text
    • https://static.s123-cdn-static.com/uploads/4373519/normal_5ff1c19cc0bfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459324/normal_5fd2620606254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487007/normal_5fd61dfc14f7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484356/normal_600417181b3ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469631/normal_60076842a02e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458132/normal_600362755babb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500882/normal_60119eb7e2f60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377642/normal_5fcc93119bbfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407304/normal_5fd9f28c290c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409110/normal_6016050b991f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463560/normal_5ff0925102b58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417664/normal_5ffd80968458e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417805/normal_5fe9707e68007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416304/normal_60106293cc8cf.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/ghhiWjb/national_geographic_marble_run_250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422148/normal_601778fb53031.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370077/normal_5ff8a0ea48237.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/gggNje3/tai_my_talking_hank_hack_appvn.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/pibabopuduj/furodituturaf.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_off0000d2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F4 5156 bytes
SHA-256: 460634fe1af98a38c8e3e7cf720dc5016601057ad31e8024fea4ff426d7adf96
font_01_sfnt_off0000e4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A0 10212 bytes
SHA-256: 9a743f7fbff0e6863d7fa7b1310407785df62baa9fb603686559f495cf12a125
font_02_sfnt_off000107d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D4 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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