Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e4cef68dc3db33…

MALICIOUS

PDF

81.6 KB Created: 2021-03-24 09:14:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d94a39d9815a4f87b9a045a9ee6ba470 SHA-1: 8620de5974427592d2da8508fcf791fdaa2cb689 SHA-256: 93e4cef68dc3db3320234314692befac4a2fd7ba142a1ab9977cad4e9b0705ef
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an external URI pointing to a URL that appears to be a lure for downloading content, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of external URLs and the nature of the ClamAV detection strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/award?keyword=best+free+pdf+books+download+sites PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369520/normal_5fdea649e7093.pdfIn PDF document text
    • http://marketes.pro/komufodopalava7s84m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fe398b0b774c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476135/normal_5fc91e0b9933b.pdfIn PDF document text
    • https://cdn.sqhk.co/pavoraxebute/yhfvjj8/robert_frost_poems.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391623/normal_601f08544ad29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421056/normal_6056776fa005c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487658/normal_603b287ac9391.pdfIn PDF document text
    • https://cdn.sqhk.co/doboketuzoj/jerYfib/radiology_tech_salary_nc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383925/normal_5ffb7724e329a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421983/normal_5fd3b996418c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486051/normal_604331e081efd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488092/normal_5ff82654c1c62.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/cAxSiiy/refekuvelugevidan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368970/normal_5ffcf32f8b58c.pdfIn PDF document text
    • http://axecheat6.xyz/the_beautiful_and_damned_song_lyrics4ugux.pdfIn PDF document text
    • http://idealsit.space/522006243442zcm7.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/fPgjhDH/14575464453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466411/normal_60121448a358c.pdfIn PDF document text
    • https://cdn.sqhk.co/metusoteliza/cogdv05/36188601058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_6015d810d73f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D5 5380 bytes
SHA-256: 53cbc2e020c6b839aea62d343580805f5c97d76f2c45f96d3a375ade22dd67e2
font_01_sfnt_off00011441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11441 10756 bytes
SHA-256: 4e66369eb3ff15eaacd82341d6922c23dc388fb82dbb1126b46f5789cd688cd2

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