Malicious PDF — malware analysis report

Static analysis result for SHA-256 8792543468716c13…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 05:22:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8f4fafb31534426545cd9fc48b5a935d SHA-1: 57a8fbb7f33af5e951e038b4805afb380f6f7b2e SHA-256: 8792543468716c132216e6f02f2b268042a83ce2c55d3c20fa1525bbb3a17cdf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector URL, which is a common tactic for distributing malware or phishing pages. The document body and embedded links suggest a lure related to game hacks and generators, aiming to trick users into clicking malicious links. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/gamesofficenet-hack-coin-master-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robux-game_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-apk_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/is-free-robux-real_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_off00005457.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5457 29420 bytes
SHA-256: fd28a85a9bed6e4738a549ab8ae53392610ff54d7459623970d645331346a782
font_01_sfnt_off0000920e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x920E 17976 bytes
SHA-256: 1ae13650c7a91d0d5fa0167cbc25bb9944253c308d2de9b657ab5d33c8f8b5c4

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