Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61f4acc1984030e…

MALICIOUS

PDF

81.4 KB Created: 2021-03-31 23:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 247432afc2a9d39d6e14e82201aaa089 SHA-1: 104358ade20a03001cdbc8ff6e14c53c91c338cf SHA-256: e61f4acc1984030e91355b7d31ea0ba5bb149d314c9f10553bccdce07f139a9f
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/123?utm_term=brothers+day+movie+songs++maango PDF link annotation
    • http://dadumuxuwu.iblogger.org/92362735923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5fd0eafb974c0.pdfIn PDF document text
    • http://niwifara.22web.org/mekogumuma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378383/normal_6008dcdbd0eff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461773/normal_601363ca1c446.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/7141988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414166/normal_602fa238bfcbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462368/normal_5fcaa080d3546.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407304/normal_6006aa07b4b10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488322/normal_602a20c5c730f.pdfIn PDF document text
    • https://gidafefutor.weebly.com/uploads/1/3/4/0/134040883/8e1f32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420430/normal_5ffdb3cc611c5.pdfIn PDF document text
    • https://kijapadawoli.weebly.com/uploads/1/3/4/9/134900431/ramataxasopujeketux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388620/normal_5feb5a651ff77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368756/normal_5fdff0961b945.pdfIn PDF document text
    • https://luvoseguz.weebly.com/uploads/1/3/4/6/134665560/mupimofinebul_nafugebujele.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477649/normal_5fcb346016386.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403408/normal_5fcf4da684cf3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1eb4c46-79a7-48fa-8c7c-7ec070dd814d/91833465648.pdfIn PDF document text
    • http://ridezaxepaked.rf.gd/bleeding_time_experiment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97bb3217-2112-4ba7-b9f5-154a61a358da/83391611462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f433e4-8329-4c77-becd-897eb45cff14/zawasudevigitajugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afcb48b0-5196-4b26-871c-56b0387d32b1/gravity_falls_journal_1_pages.pdfIn PDF document text
    • http://bofodegekero.rf.gd/32988769279.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_off000100f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F7 5416 bytes
SHA-256: fd649570d82b7d056baf8b3cd3897b16cdf4a9799bf1540495c05170cd24bc99
font_01_sfnt_off00011346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11346 10836 bytes
SHA-256: 9bb6ecfe0a8832c572688f51d898b7aa31c73f15c0207c72bb3a15efec36eddd

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