Malicious PDF — malware analysis report

Static analysis result for SHA-256 0842c09b6dbc6021…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 08:52:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9188ebb6c8cefda1ab3189bdfdb69182 SHA-1: c8f971d40c49e16f74de450d7435a599e677f80d SHA-256: 0842c09b6dbc6021c1389a92cf81db8873345d010bfebdeb08ef3f0fdaecad43
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to what appears to be a malicious redirector, promising free in-game currency and hacks. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of known malicious infrastructure. The document body and embedded URLs suggest a lure for popular games, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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/como-hackear-coin-master-iphone-game-hack In PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-hack-roblox-on-android-with-lucky-patcher_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/roblox-game-hack-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/pokemon-go-free-coins-generator_GM1094591345.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/roblox-free-body_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_off00002fa0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FA0 22544 bytes
SHA-256: b7a2f476be0ee0961d0e500a3d99f35a287f82f66e8b7e915db74d48d9559940
font_01_sfnt_off00006228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6228 18608 bytes
SHA-256: 478645cc5be930e2e24d11a127e06d3afabdf2c17363e8bbb308d1e1ffe63ec8

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