Malicious PDF — malware analysis report

Static analysis result for SHA-256 767a1049bb6202f5…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 04:46:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2f907c7de781bcecca43ea4d2d2059bd SHA-1: c92890118a90f8f151ce2d5145e3730dd46e27f4 SHA-256: 767a1049bb6202f5c17d38705ef4064e560955aa354f6b4a9c45582b3641dd15
160 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it's a malicious redirector lure, specifically targeting users interested in game hacks and in-game currency. The document body and embedded URLs point to a redirector at 'http://netcdn.tw/app/406889139/mcpe-master-hack-unlimited-coins-apk-game-hack', which is flagged as malicious infrastructure. The ML classifier also strongly indicates maliciousness.

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/406889139/mcpe-master-hack-unlimited-coins-apk-game-hack In PDF document text
    • https://opac.heritagejkt.org/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-vs-in-bee-swarm-simulator-hack_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/all-of-the-free-hair-on-roblox-not-model_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-roblox-gift-card-codes-2021-working_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-get-free-robux-no-scam-no-survey_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-jet-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-google-roblox-items_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-upgrade-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000321f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321F 22996 bytes
SHA-256: 52cb8c2006536ea0584a82faea8cb71caa902ee3cd32482914e22df3de3d4a58
font_01_sfnt_off000065ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AB 18876 bytes
SHA-256: cff328fbfbb016d0dce3cf851f5e410737f9aed8bc79c14d42fa2678cdcae346

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