Malicious PDF — malware analysis report

Static analysis result for SHA-256 65864cf5e0188cdd…

MALICIOUS

PDF

47.0 KB Created: 2021-06-04 03:09:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3c369f6f0c4be4466357a6405c08a189 SHA-1: a715596829f745bde7644b55c3764699dfa92396 SHA-256: 65864cf5e0188cddb3249e8ce30ee33381eca7978353435d1c3b9bcfa1410f39
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a malicious website, likely a scam or phishing lure for game-related cheats. The heuristic firings indicate the PDF is designed to trick users into clicking these links, which are associated with known malicious redirectors. No scripts were extracted from this sample, but the embedded URLs and the document's content strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/431946152/free-robux-generator-no-human-verification-or-survey-2021-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_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_004_off000051f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F1 28776 bytes
SHA-256: ce6b18a8a5573a4314a975cdc48ab8f9f0568d17040a2f47454bcb8904706465
font_01_sfnt_off00009154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9154 19556 bytes
SHA-256: 3a60cdb248c638d1e974f8488a9d0c49865e0dbecbd8cc682acbe36144e2e86e

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