Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a730a9f88a7e39d…

MALICIOUS

PDF

84.6 KB Created: 2021-02-22 15:04:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9203ce11200b9618399b4b7a712521c6 SHA-1: 9011afdbeaae669fdc6f5c447f90b056c2d64688 SHA-256: 7a730a9f88a7e39dbf51375773be03fb4e7e677a4f0ebaf7df86eef07f2adc1e
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.9666

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/aws?utm_term=woman+hollering+creek+summary PDF link annotation
    • http://dejenenipanoz.22web.org/admission_form_of_dav_public_school.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446166/normal_5ff680489f10c.pdfIn PDF document text
    • http://betmoy57.com/nipidepukawilakupoc70.pdfIn PDF document text
    • http://topvideo.design/31829495060tmtfn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501980/normal_5fc729b971624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_600fd80597c23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415934/normal_5fe2327db99b4.pdfIn PDF document text
    • http://yourdesk.website/lg_55_inch_plasma_tv_manualejr9z.pdfIn PDF document text
    • https://perutibabejodu.weebly.com/uploads/1/3/6/0/136051808/wokazizufolaku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463560/normal_6018e048b20a7.pdfIn PDF document text
    • http://walkover.me/30097279473fqau0.pdfIn PDF document text
    • https://sugowula.weebly.com/uploads/1/3/4/6/134646485/29e8dae72cb3e36.pdfIn PDF document text
    • https://pawimugonuri.weebly.com/uploads/1/3/4/8/134882006/bc787799f3ec9.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/rekawexuretowo/33112646410.pdfIn PDF document text
    • http://mekavebij.epizy.com/bleu_de_chanel_edt_vs_edp_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/61681164342.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/rakopari.pdfIn PDF document text
    • http://wurasegato.rf.gd/cg_comedy_hd.pdfIn PDF document text
    • http://firuxafuxu.rf.gd/chipset_gta_5_android.pdfIn 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_off00011cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC5 5392 bytes
SHA-256: 9fe503c5dad5205f0235d65444623b5e3014ee6bff9434d7b16b58cad7c400c2
font_01_sfnt_off00012f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F01 11484 bytes
SHA-256: a5315a1a9d64f4ab159d978a005636840514c1580e92fde1b011dff111da3057

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