Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26373194bb4a158…

MALICIOUS

PDF

43.9 KB Created: 2021-05-11 15:46:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 28b6525e5e0dfd9598dc2a302eb0c8c7 SHA-1: 35f6182256093151efb225a9197af77fb930b125 SHA-256: d26373194bb4a1586ebff48f63bda276de8affb8e77756114463b4fd8d71b385
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to known malicious redirectors and infrastructure, specifically advertising game hacks and generators. The presence of a visual download button lure further supports the malicious intent. While no scripts were directly extracted, the PDF structure and embedded links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/static-moonactive-game-hack In PDF document text
    • http://suaedy-library.net/repository/my-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-game_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/open-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000481e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x481E 24620 bytes
SHA-256: f92a082e53028a97e6ffefed996a004df3082154d1fe0171f5c7829b48f7cfec
font_01_sfnt_off000080be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BE 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00008aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA4 17660 bytes
SHA-256: 566e41496f2ce4db5bf6689ca7f7f854e6f85c22f14e9f322398956df4889350

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