Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d83157b9be180a…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 20:56:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6052759bf6b8ab7cfc47b8602dae6f08 SHA-1: 04c795b6707980e52cbdd335dff10626abf2823d SHA-256: 02d83157b9be180afc819e25efd9b7dc550e6ff62ae2faf4505e07ad79e49e70
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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 http://netcdn.tw/app/479516143/minecraft-java-hacks-game-hack PDF link annotation
    • http://elr.manubaba.com/__statics/gudangsoal/files/robux-free-co_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/roblox-hackeado-con-robux_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/adopt-me-pets-roblox-how-to-get-free-bucks_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/free-robux-hack-promo-codes_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/free-stuff-on-roblox-on-computer_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/se-puede-hackear-roblox-con-la-nueva-actualizacion_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/robux-adder_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3273 22348 bytes
SHA-256: 4ee2dbff7bf08fba4cb05721ffc73038db432bef4368441d7d2c781989f6dac4
font_01_sfnt_off000063f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F2 18304 bytes
SHA-256: 9916df9c76b452eb4a90c9a8e135015a7eb4b4462199644d8456db22cdeb7911

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