Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f246abe7391522…

MALICIOUS

PDF

32.7 KB Created: 2021-07-05 21:47:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ee72a9eb0c8d9646c048335c183b2d9d SHA-1: e405cdf9c9f39d7227c6775e3b8a5bcf54d7d145 SHA-256: 11f246abe7391522107fbca552a50031b25ee4243cc40e7f84a118fc80b68b1c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a fake generator or hack, designed to entice users to click through to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/431946152/free-robux-working-game-hack In PDF document text
    • http://chem.ipb.ac.id/kim/repository/assassin-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/robux-game_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-bypass-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-robux-in-the-game_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-item-codes-murder-mystery-2-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-drawing-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-vehicle-speed-hack-script_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/robux-gift-card-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_off00002995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2995 22076 bytes
SHA-256: c948ec1a2d65759a070f96bc55b0efa4d60b03aa1930a91154d496ef2995ec70
font_01_sfnt_off00005a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A73 19204 bytes
SHA-256: ce738487085ad599441484df9d90a1a143049edc5affa9a85a5d558c4f13480e

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