Malicious PDF — malware analysis report

Static analysis result for SHA-256 168e77ef43d3afce…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 23:14:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a814da84476d251885254253dc50de85 SHA-1: c968ab261ad07d5693d97dc24755367ea9659101 SHA-256: 168e77ef43d3afce2d2441b09f30e2c620a6ad6efda03e11503f0ca431b68a62
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free items, which is a common lure for malicious redirects. The primary malicious URL identified is https://netcdn.online/app/406889139/free-spin-app-coin-master-game-hack, which is flagged as a known malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting these sites, likely leading to further malware downloads or phishing attempts.

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/free-spin-app-coin-master-game-hack In PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-roblox-2021-no-virus_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-rixty-codes-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-the-labyrinth-hack_GM431946152.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_004_off000050ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50EC 24120 bytes
SHA-256: ec430109442941a55ea32018b41ff3e69991b66ebbdae7a87dd5fea8f989873f
font_01_sfnt_off00008781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8781 17884 bytes
SHA-256: 5c174c899407ca1572fe1c39ae2452d3abe3cd4971e1cdd162af291bea6e6765

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