Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2eee486c9725ace…

MALICIOUS

PDF

45.2 KB Created: 2021-06-10 17:43:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e70c48fc07efbf13e0cc40402fa661d8 SHA-1: 49dc0e79cd1822b9f6f3097a26b8de7baf10369c SHA-256: b2eee486c9725acef442ad462b31cda56eed768dc5823b47e67741a26521323c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free in-game currency, which is a common lure for phishing or malware distribution. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the use of known malicious redirector infrastructure. While no scripts were extracted, the document body and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-arcane-adventures-hack-2021-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-adopt-me-promo-codes-roblox-july-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-hack-no-verifaction-or-passord_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-no-survey-2021_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_004_off0000504c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504C 25764 bytes
SHA-256: 1c238e85f98e2b0b9a1563da995efbcfc6a6d054d4fa859f04c432efe64a7a93
font_01_sfnt_off00008b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B76 19116 bytes
SHA-256: ef42e91cbae7ae3957e772cc017aa473b87f8120218dad14f9e6208aa0bac629

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