Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a829248c9d7745…

MALICIOUS

PDF

44.4 KB Created: 2021-06-04 01:48:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e5cf1771d125a37ac8da1929936297ab SHA-1: ac02251181fff6a2e613409aaf2c76c2053a33e7 SHA-256: 56a829248c9d7745c8028fe2032f91cd892856ef2e873fa4880849c5f6c43a8f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_GAME_HACK_REDIRECT_LURE' heuristics. The document body, though partially corrupted, contains references to game hacks and generators, aligning with the lure. The primary malicious action is the redirection to a URL designed to exploit user interest in free in-game items, likely leading to further malware downloads or phishing attempts.

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/406889139/best-free-spin-app-for-coin-master-game-hack In PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/actual-free-robux_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_off00005242.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5242 24988 bytes
SHA-256: a2856d6b80f3c200771a6b8d8c096a34c0d89a9ff2e69d810b1063041a11a5ab
font_01_sfnt_off00008b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B66 18104 bytes
SHA-256: 696eb84ca3d86a9d6d5f53637eee870c8736518ac79d3d0dcda7670393ffe90a

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