Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8edc5a67398b33a…

MALICIOUS

PDF

66.8 KB Created: 2021-03-01 20:55:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 64cd35c4d52b889d50d81e85a36796d5 SHA-1: d41fcf89e4983da7e6fcb91046916dfde62d5171 SHA-256: d8edc5a67398b33a2d5f0c52ec2a924076517e39f0974f11bd003cefde246f69
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, and a heuristic identified it as a link farm. The ClamAV detection and ML classifier also indicate maliciousness. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8307

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 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
  • 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/award?keyword=blender+tutorial+beginner+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425915/normal_5fe28904aa817.pdfIn PDF document text
    • https://vifapuxup.weebly.com/uploads/1/3/4/0/134018045/4ef7061c9fb9403.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/77292338939.pdfIn PDF document text
    • http://salonop.xyz/how_to_install_evenflo_sonus_65_convertible_car_seat9suaf.pdfIn PDF document text
    • http://ita-talia.fun/57450850839xhxrz.pdfIn PDF document text
    • http://paganel.world/assume_form_james_blake_wikipediaadqnm.pdfIn PDF document text
    • http://milanomoda-italy.website/what_is_an_example_of_negative_devianceisqe1.pdfIn PDF document text
    • http://beautytopshop.site/697774084709qahd.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/kitakilesa/xodimabisixabodexetutigi.pdfIn PDF document text
    • http://mitefarosut.rf.gd/kingdom_come_deliverance_sword_combat_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/correctional_officer_interview_questions_and_answers_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/kozaxiwosabulami.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/big_maxx_heater_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/45865691851.pdfIn PDF document text
    • http://fozubogedunok.rf.gd/zodepafojimivumutatamugum.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE170 5280 bytes
SHA-256: 3bb010649ef4bb91beddc0328ed0ef49d622e714c29f37059777b4c98d7579bb

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