Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b824a9001d77da…

MALICIOUS

PDF

34.6 KB Created: 2021-07-08 16:37:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: da480797e87f704f85d446af9b70b731 SHA-1: 6fa756b60f629734ab2755cfb6e162706f47d65d SHA-256: 68b824a9001d77dad59dd0dbb6d37bfb95c8012ff63928838c89618f1276cb0b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as a 'free generator' for a popular game. The document body and embedded URLs strongly suggest a lure for users seeking game cheats or currency, which is a common social engineering tactic. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious nature.

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/coin-master-hacks-for-spins-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/bird-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-do-you-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/t-shirt-roblox-free-shipping_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/800-robux-free-pub_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robux-scam_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-promo-codes_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
stream_002_off000030f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30F2 22984 bytes
SHA-256: ebe3b9d188fc6c95a5f9577c80e702e5ea9f3f90825335baa637a68d7268af23
font_01_sfnt_off00006485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6485 18344 bytes
SHA-256: 947667c85d24b0d3a8de245f111eeade861a88a333665e7462fd4878b305e25b

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