Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f1e10b90a517749…

MALICIOUS

PDF

78.7 KB Created: 2021-03-13 19:16:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 000c475a37f10161e365ff6accd540a4 SHA-1: 848443d1e6bf02b04e46f8c61b19549a5b18f9a2 SHA-256: 1f1e10b90a5177491df4f0d9670b5dca55617d245f130c42fef3b0305bc93a07
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains numerous external links, many of which are hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The presence of a 'download button' lure and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/wix?keyword=john+wick+3+site+drive+google+com+mp4 PDF link annotation
    • https://cdn.sqhk.co/remezebona/ZjfPhic/nuwobukebotoz.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/best_selfie_stick_for_gopro_and_iphone.pdfIn PDF document text
    • http://luxibenuguk.getenjoyment.net/2163445441.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/Mjd0hgN/cheap_racing_wheel_for_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/bafuberudod/h7ihd2q/potemajoduritovipomi.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/1IhhB3C/gst_status_uttar_pradesh.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/bkgiihG/55723140594.pdfIn PDF document text
    • https://wowujisalot.weebly.com/uploads/1/3/4/3/134349860/befololaketaz-torom-tixeri-zazerita.pdfIn PDF document text
    • https://cdn.sqhk.co/kisibijobu/gjhhcic/parachute_cord_rope_for_sale.pdfIn PDF document text
    • https://gafogipew.weebly.com/uploads/1/3/4/4/134475428/6026808.pdfIn PDF document text
    • http://mibejar.sportsontheweb.net/cannondale_habit_2020.pdfIn PDF document text
    • https://fakavenudir.weebly.com/uploads/1/3/4/0/134042443/rofawe_tutiwogasupaw.pdfIn PDF document text
    • https://kavasudominid.weebly.com/uploads/1/3/0/8/130813783/nuluzelokonavibil.pdfIn PDF document text
    • https://tupemewona.weebly.com/uploads/1/3/0/7/130775182/7696a4a2a3d760c.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/dheJjja/circular_buffer_meaning_in_computer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_f4e487408e3843ebb807d329929dfab7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figugipopar/xonotogejumafivoxoxin.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/how_to_add_a_file_to_my_wix_website.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/86614039523.pdfIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_7f7d8d9834ed45b1b04382a25c8f8fb3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/matlab_an_introduction_with_applications_6th_edition.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_off0000f438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 5736 bytes
SHA-256: ae732871792feafedca1f6677a3e5bd2a8e9380d84d258ff592fccccc38fb60a
font_01_sfnt_off000107b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B7 11140 bytes
SHA-256: 8fea6a9c71a3b9d3514e192b316b58c828606afa2c4a1d003879fde079c1242e