Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62f9b64bc8eaa86…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 17:44:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 83bfc3f81be59e8f3fa18e20f94e84ba SHA-1: 9f39bfea8cba37f1f01a9ae6f12d95c0223be6b3 SHA-256: b62f9b64bc8eaa867c68095e59e25eafbf90316179bf022f9ee31523c6493298
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The primary lure appears to be related to game hacks and free currency for games like Roblox and Coin Master. The document body and heuristics indicate a redirection to potentially harmful infrastructure, likely for phishing or malware distribution.

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/431946152/roblox-promo-codes-for-free-robux-game-hack In PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/free-20212021202120212021202120212021202120212021202120219-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/free-roblox-interview-center_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/roblox-phantom-forces-hack-2021-august_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/cheat-engine-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/free-robux-promo-codes-website_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/how-to-get-free-robux-on-roblox-by-playing-games_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/free-robux-yummers_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/sites-de-hacking-de-compte-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/tiktok-where-to-watch-free-movies_GM835599320.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-robux-hack-no-verification_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_off00003297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3297 21752 bytes
SHA-256: 6a00872d24558fd424a85fb4cb3704578d32af32cdbf5fd83896c5f72d0d082e
font_01_sfnt_off0000628d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628D 19380 bytes
SHA-256: f599988ad614928277529a5070f43d57f30efd84bc389ab6e612c4c8b358aa39

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