Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4d7527c167398a…

MALICIOUS

PDF

44.3 KB Created: 2021-05-11 09:05:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6b3363bdf3218eb939b9ec3bb9be6494 SHA-1: 105fb0f6caa9ff8730b507153d0797a33c8bef1b SHA-256: ec4d7527c167398a255536f78169099043e46c07a645b93716fe2bf5bb687081
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically luring users with game hack generators. The document body, though partially corrupted, contains a URL that aligns with these findings. The embedded link likely leads to a phishing or malware distribution site, attempting to exploit user interest in game cheats.

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 https://netcdn.xyz/app/406889139/free-coin-master-androd-cheats-2021-game-hack In PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a13.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A13 30288 bytes
SHA-256: 44fc0b7a659c94f1d61689f2761ebaeabfcd21eb109e2dc783b6a4887cfe0e31
font_01_sfnt_off00008a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A80 18452 bytes
SHA-256: 61e5d8ad188eb015ddf9a5df69a65c9352fe70e06cc8ab935c42147f18f81b24

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