Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e2f8b79bd46899…

MALICIOUS

PDF

43.8 KB Created: 2021-06-04 00:25:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2441eab5fe84bde7cddae9910791f648 SHA-1: 631b42509b24fb71dc5821f90ee3bddc46b33c1d SHA-256: c5e2f8b79bd468995bf7cca35fd69d53d5d83e3ba76fd32300df301d7b6a6857
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising free Robux and game hacks. The document body, though partially corrupted, contains text and URLs consistent with a phishing or scam lure. The primary malicious activity observed is the redirection to external malicious infrastructure, likely to deliver a second-stage payload or conduct further phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://netcdn.online/app/431946152/free-robux-roblox-promo-codes-game-hack In PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/tiktok-watch-free-movies_GM835599320.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-pokecoins-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/pubg-uc-in-cheap-price_GM1330123889.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-spin_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/tiktok-free-view-kong_GM835599320.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spin-and-coin-link-today_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_off00004d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D0B 25868 bytes
SHA-256: 794632dea4caa2c3cb391dd1ee6b300a6ad425ee2896003d68e9569e518dcbb6
font_01_sfnt_off00008793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8793 18676 bytes
SHA-256: 9297a3cb5fba7ca587652f513aa1222127deb04773b45a9c0f6482a9c793d56f

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