Malicious PDF — malware analysis report

Static analysis result for SHA-256 39183d52ca4fd4ae…

MALICIOUS

PDF

66.1 KB Created: 2021-03-01 05:20:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b1285194bd6186d2a9d470dd71470fb2 SHA-1: 118a6463ca79804b69d1dd9c21bca89422a3e15c SHA-256: 39183d52ca4fd4aed57cd93d786e41b6a731f134e1aa7a6c7c34eb4dce335859
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 0.9998

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://pelibifir.ru/wix?keyword=are+you+the+one+for+me+pdf PDF link annotation
    • https://bosowumajozidu.weebly.com/uploads/1/3/0/7/130740465/nixonor-tovepedowefif-wanize.pdfIn PDF document text
    • http://copyrighytsupport.com/dependent_prepositions_worksheetcosvl.pdfIn PDF document text
    • http://xtreme-sport.ru/bergeys_manual_of_systematic_bacteriology_online_freee9p0n.pdfIn PDF document text
    • http://momentshop.space/music_box_song_freeq91vt.pdfIn PDF document text
    • http://cmbclientes.com/kobilcuk18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426697/normal_5fcf5842046bb.pdfIn PDF document text
    • http://itasda.online/386420671505quik.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/how_to_program_your_homelink_garage_door_openerpg2ci.pdfIn PDF document text
    • http://pycnidwzxc.info/carolina_hurricanes_schedule_2018-_19mk3v4.pdfIn PDF document text
    • http://pumba.fun/zorirab9tb3.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/how_many_hours_do_french_students_go_to_school.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/dojivewobasuval/24738417306.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/warcraft_3_reign_of_chaos_key_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/sixth_grade_math_worksheets_order_of_operations.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/67935973726.pdfIn PDF document text
    • http://zonatitusajobo.onlinewebshop.net/jurepix.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_off0000c808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC808 4952 bytes
SHA-256: 211bd91549b933ffcd2ee323786f32243f56878f557fb6ce75d5df288ce72f22
font_01_sfnt_off0000d8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 10252 bytes
SHA-256: eb4512d076c5e4d246db3dbb00e37d8546c7ca706d4620c188324c65e6b9984e

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