Malicious PDF — malware analysis report

Static analysis result for SHA-256 31522a584fabdd69…

MALICIOUS

PDF

68.9 KB Created: 2020-12-25 12:08:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4894a8115c3485396529951a1ba87bb8 SHA-1: 35ec6f34b62a060c0e383e819018196cd618c758 SHA-256: 31522a584fabdd695815f34563243fe76ca586d2d6a05d0bb7d029dfe5c41ffe
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=stickman+rope+hero+mod+apk+3.+3', which is disguised as a game mod download. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The embedded URL is likely used to deliver a malicious payload or redirect to a phishing page.

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
  • 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://gettraff.ru/strik?utm_term=stickman+rope+hero+mod+apk+3.+3 In PDF document text
    • https://cdn.sqhk.co/kitaparek/ipXjaji/83654194131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f8a4793051b9.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/ibhjiU0/kelido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5fa2dda137c44.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/kujesulad/body_boss_workout_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/364aacb7-f136-4229-b578-81958c63bbfa/60675852375.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/39333634489.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/28584573408.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/bejoguxutomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3878d495-a411-41f1-86f6-d89cf5cc8f7a/suronavig.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/2404556996.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/57944308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/797a937e-9e9b-4741-8dad-1b178d516bc0/pawizefuvosonozoxen.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD016 5468 bytes
SHA-256: 987f7781345ecf5b21b1148a97e4e20981b0c554d9d8fe28409ee7a59244bb12
font_01_sfnt_off0000e28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28E 10684 bytes
SHA-256: 4556437260bf6596452c8b5da5bc50e079453ab78d612c25823378ec8e7d923e

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