Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bb120703025ac0…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 07:47:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8c56135b2ca7a83e8a34e151e52af748 SHA-1: 0b7704cbc01afc9ba1835ae5b5e14110784706e2 SHA-256: e6bb120703025ac0486c0d4b442c8474fff32bb525481814fc3e3219d7f18dfb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting "free generator / game hack" lures. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary function appears to be redirecting users to potentially malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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-free-spins-link-hack-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/114-4-hacks_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8A 25660 bytes
SHA-256: c4865e2f78dd05eac252238b200461a28f1bcb8f5e0a07f35034fa78c3398304
font_01_sfnt_off000089cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89CD 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000093b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93B8 18056 bytes
SHA-256: 654168d3b6bcb61be570e1238605831ee66fed80d87ac67967dd188319cba9ee

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