Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d06884eefc5ec7…

MALICIOUS

PDF

80.4 KB Created: 2021-04-06 13:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d04240703f7be4a9c6174f58bc68473 SHA-1: 57ed3b9be119de5f4eb5c3f621be49e0f4875d37 SHA-256: c9d06884eefc5ec7f28200080d480aa626816ea35a8745cbff82b23b7c48f7c0
186 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 6

  • 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.
  • 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
  • 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://leonvi.ru/strik?utm_term=dan+brown+complete+book+list PDF link annotation
    • https://zijavenokin.weebly.com/uploads/1/3/4/3/134315340/ratuxavibupowajex.pdfIn PDF document text
    • https://tunilixagipibi.weebly.com/uploads/1/3/5/3/135304468/jiwotiputakul_kiperojipirepu.pdfIn PDF document text
    • http://desokore.medianewsonline.com/how_to_prepare_for_aws_cloud_certification.pdfIn PDF document text
    • https://jawenovexexadu.weebly.com/uploads/1/3/4/0/134012785/9257209.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/vcf_file_to_converter_online.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/1b8d2ac13962.pdfIn PDF document text
    • https://nuluvefum.weebly.com/uploads/1/3/3/9/133999802/1384185.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/0fac9e3.pdfIn PDF document text
    • http://fajufoturesu.sportsontheweb.net/vejaxon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/25435914-8268-45e3-be32-08dc6047527c/14716196388.pdfIn PDF document text
    • http://fakonin.rf.gd/foraminifera_morphology.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/lab_11_mendelian_genetics_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab989694-1c21-4235-9a3e-44b270729d52/bijexoresiziziweredi.pdfIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/bartok_mikrokosmos_volume_3.pdfIn PDF document text
    • http://lipeporo.onlinewebshop.net/phonics_activities_for_preschoolers.pdfIn PDF document text
    • http://sasirirufib.rf.gd/synaptics_touchpad_driver_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/arjun_reddy_movie_telugu_full_movie.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDD 5164 bytes
SHA-256: 28cfc4469cce55e5a949cdf54b44023e52c36ccd45d988f9169034412b8d3f33
font_01_sfnt_off0000ff56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 11796 bytes
SHA-256: 28d9e46d1f45b7d0d77ef8fd2cef8faefa4986cff5ca0e294ec4a020e5eb6ed3
font_02_sfnt_off00012697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12697 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.