Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ab2d9cbfb723fb…

MALICIOUS

PDF

42.2 KB Created: 2021-05-10 14:01:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9f2de8954aeb3b5dcfb57749bbe74db3 SHA-1: 8458ede8f3fd6b910c9c86dee5ef3873e79bd38a SHA-256: a1ab2d9cbfb723fbbfc9cd97a344c5ceeb0d4186a1122e69280d0a80f3bbba47
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for game hacks and free currency, directing users to a known malicious redirector. The document body and heuristics indicate a clear intent to deceive users into clicking malicious links. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/hack-coin-master-free-game-hack In PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/corn-master_GM406889139.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-for-today_GM406889139.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_003_off00004b2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B2B 24636 bytes
SHA-256: 5fc5e6d03a024b70c43c86c54d91ea7109ed9f4f8f478ca0ed02907647b73dcc
font_01_sfnt_off000083e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E4 17880 bytes
SHA-256: 257aee740a5ae17e91b93ad4d540c168849f24efe28ef42b55966c96749a0114

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