Malicious PDF — malware analysis report

Static analysis result for SHA-256 faaf416a033e214b…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 21:54:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5f04fd48f042de391fc4173728f40034 SHA-1: 590057400e4103ebeb034cd011706106b4adb7b2 SHA-256: faaf416a033e214b3c6ea6b6df16702a347d192b03c656ce5db0ebf5824f87c2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, masquerading as a 'free generator' or 'game hack'. The document body and embedded URLs strongly suggest a lure for users seeking in-game currency or cheats, which is a common social engineering tactic. The ML classifier also flagged this PDF with high confidence, indicating malicious intent.

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/robux-free-online-game-hack In PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/meepcity-roblox-hack-menu_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-hack-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/batu-kolukfaki-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/gamekit-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/nuebo-hack-de-robux-atualizasion_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/robux-in_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_off000030fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FE 22300 bytes
SHA-256: a8d1030b1141180046fe46c8060317bbd415f08ce34401d62d446cb6f447e6ea
font_01_sfnt_off000062a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A4 18912 bytes
SHA-256: ff36d619ce8e62cd296b26c96b34fbe88819c62effb096e20d6751b4628d3f13

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