Malicious PDF — malware analysis report

Static analysis result for SHA-256 189b40a960455a5e…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 11:32:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3cac2efda3c3d2d7d877285fe7b5a069 SHA-1: 1ef3c43778cf3563f9fa5f0b7451f95bcfdbb188 SHA-256: 189b40a960455a5e06043ed12d31845943694876164514f0509f56ad7a355384
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The primary lure URL is http://netcdn.tw/app/406889139/hack-game-coin-master-game-hack, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to lead users to potentially harmful content or further malware downloads.

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/hack-game-coin-master-game-hack In PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-your-friends-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-any-account-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/pubg-uc-in-cheap-price_GM1330123889.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-tiktok-likes-no-verification_GM835599320.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/claim-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/synapse-free-download-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/hack-for-free-fake-ptomocodes-that-give-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/mm2-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/hacks-for-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-beyond-level-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/get-a-profesional-roblox-game-cover-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/pokemon-go-free-mewtwo_GM1094591345.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_002_off0000331e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x331E 23472 bytes
SHA-256: 54af72d84c649013349c313ad23e004e26a92f0b2af8a218d9cd578f6b54086b
font_01_sfnt_off000067fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FA 18264 bytes
SHA-256: 5f1b6d09a0bad61aa3d888ffd8d12dad277b47eefc04d0416292618a0547d003

Open this report in the interactive analyzer, or submit your own file for analysis.