Malicious PDF — malware analysis report

Static analysis result for SHA-256 da18878e02455428…

MALICIOUS

PDF

66.7 KB Created: 2021-02-16 00:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 994272a6a8cd33743282a8429cf16c20 SHA-1: f9d691e1a1414dc02d19146567f6140174c1017c SHA-256: da18878e024554287b0ac13b00ad79e26e9e9a50cc10915cae94e16eafe2f92f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://yafferge.ru/wix?keyword=leah+itsines+age In PDF document text
    • https://cdn-cms.f-static.net/uploads/4447265/normal_600b18b991f66.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/dhahgoX/zilogumuxaranolenego.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/hhhiUgh/10704674907.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/hgdgaxu/33213276954.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/1tEA5mq/jigawezogezuvezok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5fd6374a9b526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_600de14cb5a0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_5fd91dbf1dca8.pdfIn PDF document text
    • http://otomail.business/the_lpa_anatomisedslf7g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471252/normal_5fd0bc1f1d9ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388818/normal_5ff03164921de.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/ggjgjja/bewuzesagigukexidi.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/pasutiz/aggiornamento_android_per_tablet_asus.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_off0000c9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C1 4760 bytes
SHA-256: f647e389f07f150533f7be5c344bc1afef2c6f38e690fa5776302cd85afd274d
font_01_sfnt_off0000d9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F8 10748 bytes
SHA-256: 6daa7ac0c75f88641ac4e3f89613a735a7c38eba6dcaaf08a70d00aacc2a24cb

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