Malicious PDF — malware analysis report

Static analysis result for SHA-256 cddba2971714555b…

MALICIOUS

PDF

69.8 KB Created: 2021-03-07 20:37:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a4327039f65fbc3978d3c3866888e9fa SHA-1: d2f0385ccec42de7835703ac0f274fdcf9d7d5d5 SHA-256: cddba2971714555b1901ad521d73c850f3392675793a54926f863c3e27e1173a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, likely intended to manipulate search engine results or direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wix?keyword=dads+club+swim+team+facebook PDF link annotation
    • https://cdn.sqhk.co/boguzivipel/3hfjgAi/genesis_united_methodist_church_louisville_ky.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/ifQjgij/indycar_vs_f1_car_size.pdfIn PDF document text
    • https://dizabulis.weebly.com/uploads/1/3/4/5/134524464/8697346.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/fhggehh/xunopezefuxuvaxevoteteta.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/ZQbg6oz/ropabase.pdfIn PDF document text
    • https://tadizusojad.weebly.com/uploads/1/3/2/7/132712436/6582c3cade68.pdfIn PDF document text
    • https://nopefulewipedu.weebly.com/uploads/1/3/4/3/134314682/zariranilo.pdfIn PDF document text
    • https://xelegiri.weebly.com/uploads/1/3/4/4/134435730/3cba36851.pdfIn PDF document text
    • https://tesegape.weebly.com/uploads/1/3/5/3/135387632/zewusinubuzekinugu.pdfIn PDF document text
    • https://vuveporejar.weebly.com/uploads/1/3/2/6/132695394/pafefoduzukapunibewo.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/iekgen0/15080357554.pdfIn PDF document text
    • https://luxutavu.weebly.com/uploads/1/3/5/9/135964445/48d51173bee.pdfIn PDF document text
    • https://burodepizojeke.weebly.com/uploads/1/3/2/6/132696233/7738288.pdfIn PDF document text
    • https://vadiduriku.weebly.com/uploads/1/3/4/4/134445950/068a41a1f1ae84e.pdfIn PDF document text
    • https://cdn.sqhk.co/xezalagefog/hflQ4hb/user_guide_dji_osmo_action.pdfIn PDF document text
    • http://tikanaw.mypressonline.com/gtx_970_hashrate_monero.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/a3204a9c-56c9-497d-87b4-d085fbb02088/baltimore_catechism_3.pdfIn PDF document text
    • http://vekemelegewimo.atwebpages.com/best_21_inch_lawn_mower_blade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b1c630-8e92-4a54-8b8f-68740610cadf/xesalutagefonifemise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c23fb16-5ddf-4d1f-b263-a7e74eb354d1/wegatosex.pdfIn PDF document text
    • http://xuxalonitu.onlinewebshop.net/24880626963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8760c575-6a1c-4fa9-aa82-ab8814bd501a/39342753328.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_off0000d519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD519 5368 bytes
SHA-256: dc3bf1e5e12f80b2de02aa1432056a42770c7716e7670e793ee6b043eddf57ce
font_01_sfnt_off0000e767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE767 9968 bytes
SHA-256: 883176cf0488e0d3e4498af1faa9da71b2d11c35dd1dd8a00f4066070858d7e9