Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b72d3ca917ec7a…

MALICIOUS

PDF

43.3 KB Created: 2021-06-04 01:46:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5c0ff980672795ef552f81fe6838f958 SHA-1: 96157911427de5c4e68c529fbed6a67e9fb15565 SHA-256: a5b72d3ca917ec7ac7867fcbaa65468c453370c777905f401ad4fcff1d0fc967
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirector infrastructure, specifically promoting game hacks and generators. The document body and heuristics indicate a lure for free game items, aiming to redirect users to potentially malicious sites. No scripts were extracted, but the presence of malicious links and the lure suggest a phishing or scam attempt.

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/coin-master-apk-hack-2021-game-hack In PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pokemon-go-free-stardust_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-premium-account_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_off00004ea1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EA1 24300 bytes
SHA-256: 398c15495eebe061b52a82b41a010619c35fd4b8c871e3eadc1370e59ca1daaf
font_01_sfnt_off0000865e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865E 18296 bytes
SHA-256: 38ab7dd9b05d130c6921055533cd0a0926596721d5b0ea37391651c81168482a

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