Malicious PDF — malware analysis report

Static analysis result for SHA-256 56cd720072395acc…

MALICIOUS

PDF

33.3 KB Created: 2021-07-07 18:52:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a37f6c5775be48e17aaae40edf131f88 SHA-1: 30ea1f2afe8df93dab7697c882306136c6e3ec1e SHA-256: 56cd720072395acc137a6fe9a17a3d065902c5aa572d8a6c3da58bf94e6fe979
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The primary lure, http://netcdn.tw/app/406889139/coinmaster-game-hack, is identified as a known malicious redirector. The document body and embedded URLs strongly suggest a phishing or scam attempt to lure users to potentially harmful websites.

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/coinmaster-game-hack In PDF document text
    • https://au-ma.com/image/data/files/how-do-you-get-free-robux-in-real-life_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-make-your-own-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-hack-any-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-claim-your-reward_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-hack-march-18th_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-make-yourself-look-like-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-candy-script-roblox_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • https://au-ma.com/image/data/files/beast-mode-face-roblox-free_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-get-free-easy-robux-vortexx_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-spin-today_GM406889139.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_off00002d37.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D37 22596 bytes
SHA-256: af6a85158eccef8c8cd1e65f29aaac3fde532e6d01b98b8913933ffc1a95f2bb
font_01_sfnt_off00005fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE8 18092 bytes
SHA-256: aeec47090e2d397d52e6994ac52fcd26f4fdd646fe6594f845e9ca54af877ae9

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