Malicious PDF — malware analysis report

Static analysis result for SHA-256 5546cb1a2d6c11a9…

MALICIOUS

PDF

45.1 KB Created: 2021-06-04 02:57:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d772abacdfccf950751531dfeee65f02 SHA-1: 9cc75510cf4cc4c39fac59a5a3673940f5f6a02c SHA-256: 5546cb1a2d6c11a95ec61437174811e94d3075d4fe1ae16435d470f32b2ec30a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to known malicious redirectors, specifically advertising free game hacks and generators. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lure users to malicious websites. No scripts were extracted, but the presence of malicious links and the lure indicate a high likelihood of further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-roblox-animations-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.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_off00005348.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5348 24788 bytes
SHA-256: 841c2d0c10897e7fbbf072d33e6acb3844451526e6272ee55efb34b28bbe8911
font_01_sfnt_off00008c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C86 18660 bytes
SHA-256: b7eb9f6264085e4628e5be6666b33d277e79f075b825501a8967555352acd939

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