Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4fa249d3e4d759…

MALICIOUS

PDF

44.0 KB Created: 2021-06-04 03:16:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8e60f9edad6dacae0a52a17e96ffa9a7 SHA-1: 8cedd5d2156176fe5fd9af7647f96e413d0ba0b3 SHA-256: 8e4fa249d3e4d7590109f61ba2ed6333f3985f096c97111d155caf8a57a5c358
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and extracted URLs reinforce this social engineering tactic, aiming to trick users into visiting malicious sites. No scripts were extracted, but the primary attack vector appears to be a deceptive link designed to lead users to potentially harmful content.

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-survey-game-hack In PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/robux-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-spin-ml_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
stream_004_off00005042.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5042 24676 bytes
SHA-256: d1c79d03f09d7ddf0c09d548b26530ead78c977d982aa5acf7bb775f335bbd66
font_01_sfnt_off0000892e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892E 18308 bytes
SHA-256: 74a940f1217583ab80956cd168fb81f959241543e2b3413e790743682303989f

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