Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f879ef91918963…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 06:06:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3eba5c98fade9e7b05736103a4666d8f SHA-1: 6e15ffc8e3021130432cd997b5c19d486e2b8fc0 SHA-256: 72f879ef919189633a0878e03251185d9d7d2fd233cd3d3228a514be55cfd238
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The document body and embedded URLs suggest a lure for free in-game currency or account boosts, which is a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/835599320/how-to-get-followers-on-tiktok-for-free-game-hack In PDF document text
    • http://lib3tell.stptrisakti.net//repository/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/minecraft-java-free-account_GM479516143.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_off00004e44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E44 24780 bytes
SHA-256: 3056bb78ae699c8c109cda044a87dea8a9ddc6818c60037d9f7716ec478959d1
font_01_sfnt_off0000876b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x876B 17692 bytes
SHA-256: b635499a4f9fb6d9e8967cb3fdd5afd49967982b90c247824071efdea06cfe8e

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