Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3ca88843193eab…

MALICIOUS

PDF

34.8 KB Created: 2021-06-30 11:41:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 982badb558038438d0a0d2cacb4e4310 SHA-1: b6c61fa31b2d54ab4f747b1ce0166d1ebddb71f7 SHA-256: bc3ca88843193eab67aa465db7a07aeceb4165032c96a9af14fc709cfc8b32d0
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and generators. The document body and embedded URLs suggest a lure for free game items or cheats, likely leading to malware download or further phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.co/app/431946152/free-roblox-birthday-printable-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-patch-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/police-sim-hack-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/mobile4free24-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-two-floors-on-roblox-blox-burg-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robloxhacks_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-jailbreak-noclip-hack-download-in-description-patched_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-works-100_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-no-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-sell-clothes-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/harked-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/give-me-free-robux-plz_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coin-master-spins-blog_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_off00002ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED9 22588 bytes
SHA-256: 6c913cdcd51e6558e8799e2226e06188b93cb6f09c2cde9f99e913c9c7cb12a1
font_01_sfnt_off0000617b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617B 19548 bytes
SHA-256: 5b69b5713ce9a187c0c158d3ba2f3228c7e7b2ecdf855237125e58bdf735bc12

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