Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd5f18423020915…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 07:52:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 652e56336983826c8a9a3cfecc0bd0d3 SHA-1: cb13071ff0fcfb613df65a28ba5cc1bb40cadfc5 SHA-256: 5dd5f18423020915b49cc41681148bf5a5ee4a93dd9edac64e7eed262e65b828
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The document body and heuristics indicate a lure for game hacks and free in-game currency, aiming to trick users into visiting the malicious URL. The primary function appears to be directing users to potentially harmful content or further malware delivery.

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/coin-master-hack-using-lucky-patcher-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-wings-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/keyword-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-apk-hack-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-toys-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/cheat-dbr-roblox-ccv3-20218_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-cia_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-fly-in-roblox-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-hack-roblox-ban-accounts_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-get-a-free-face_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/wearedevs-roblox-exploits-and-hacks-amp_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-guest-chat-hack_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_off00003309.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3309 22672 bytes
SHA-256: ee657b5d1e120335d432961a562d996907f6fd9d21c455bf0448e6383804d158
font_01_sfnt_off000065c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C0 18832 bytes
SHA-256: 4e42799b3572d1241d93d93b188e429b6a90beaba4def4bd8627acee4e24b07a

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