Malicious PDF — malware analysis report

Static analysis result for SHA-256 424c1ef39de0748d…

MALICIOUS

PDF

41.1 KB Created: 2021-05-18 00:00:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 044e22594c9dcb057ce834c30335af1c SHA-1: 6aa1ffc9dda52010f9f3c52252cb10f11d4ded2d SHA-256: 424c1ef39de0748d89e864ff3ce713386308a24eed3b64da78a6221790cd2e7e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and cheats. The primary lure is a link to 'free-cheat-codes-for-coin-master-game-hack'. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack aimed at tricking users into visiting malicious sites. The presence of multiple similar URLs reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-cheat-codes-for-coin-master-game-hack In PDF document text
    • http://jdleducation.com/images/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://jdleducation.com/images/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://jdleducation.com/images/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://jdleducation.com/images/robux-place-rewards_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_003_off00004774.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4774 24568 bytes
SHA-256: 6a8ab4611604d28bafc50da85480a4d25cb39feccfaf4e36e06abcc24615f2a3
font_01_sfnt_off00007f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F28 18052 bytes
SHA-256: 9f7c336b46bb1f5c4c699c2d489464edf46c0e280b3a3f852c1bdf3bee9ca033

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