Malicious PDF — malware analysis report

Static analysis result for SHA-256 dacd8665edd789d0…

MALICIOUS

PDF

35.3 KB Created: 2021-07-07 21:15:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 880d6b8d838df17f6edac2c109979a65 SHA-1: 289ab774bd45587530901e5262a9e457cfd0ae23 SHA-256: dacd8665edd789d040e6475ed84d65bfe3b729d021dc1e38753a1802968578a6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free game hacks and generators. The primary lure URL is http://netcdn.tw/app/479516143/play-minecraft-pocket-edition-for-free-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/play-minecraft-pocket-edition-for-free-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-pokemon-go-free-online_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/script-executor-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-studio-install-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-followers-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-glitch-no-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-2021-still-working_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/giving-away-free-robux-cards_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/mcpe-download_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.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_off0000348c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x348C 22476 bytes
SHA-256: 4f731f4a63316ea8aabe2569af0364afd4d5ee88adfa9807a486e5fd6c9f4dc2
font_01_sfnt_off0000661a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661A 18752 bytes
SHA-256: 1c750ae825fc9a886ea70e83678fe12c2f590e2b55fff129ba454ba43f005414

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