Malicious PDF — malware analysis report

Static analysis result for SHA-256 26363fc89bec03e3…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 20:51:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5142dde2422b658a84191a6c2bfc81d1 SHA-1: 967459f96c44d6bd80c4c8cb48ac97dd5e2ac1b3 SHA-256: 26363fc89bec03e3c9ab7132e09acbc0af2825b5bba3797152dfcf94a3a463f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The document body and embedded URLs suggest a lure to download a payload, likely related to cheating in online games or obtaining in-game currency. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector designed to trick users into downloading further malware.

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/hack-xp-net-coin-master-game-hack In PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-get-free-robux-works-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-roblox-premium-generator_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-do-you-get-free-roblox-coins_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-cheat-shinobi-origin_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-hack-2021-john-doe_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/minecraft-game-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-robux-codes-for-iphone_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-cheat-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-obby-games-free_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_off000031bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31BB 23236 bytes
SHA-256: eb63f80c9732230d9c70d395672d56bc8773ec794c02217ff227324f8ea154bd
font_01_sfnt_off00006624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6624 18408 bytes
SHA-256: b3308b8a91f1ba8e8f472f4b736f4bc560ec0a61da9f358da8e6ee933f9aae69

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