Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6079c3d15f74975…

MALICIOUS

PDF

48.7 KB Created: 2021-06-03 09:22:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 09fc77aec9a43230f2a352dddbfc4c10 SHA-1: 271f50e017f9b4959aed1dc5e819fde22f371fc1 SHA-256: c6079c3d15f74975c94c685f2d0f5354c241f42042440162c1133c80f03378d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and generators. The primary malicious URL identified is https://netcdn.online/app/431946152/roblox-arsenal-hack-game-hack, which is presented as a 'free generator / game hack'. The document body, though partially corrupted, contains references to this URL and appears to be a lure for potentially unwanted software or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/431946152/roblox-arsenal-hack-game-hack In PDF document text
    • https://library.iuli.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/ww-roblox-come_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/hack-speed-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/robux-for-offers_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/hack-download_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/best-free-robux-sites_GM431946152.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_off000053e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53E4 25508 bytes
SHA-256: ea4435dc62e81592816476c05dbb2ae885b7dbdaf88b95539dc0c068f6a9da01
font_01_sfnt_off00008eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBA 3992 bytes
SHA-256: ca9cd4f0345d8483bda3e807ea4e40142b8bf70d3672af2d6a5dd7953d1a2391
font_02_sfnt_off00009be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE1 18184 bytes
SHA-256: 950cb6c94e3217e8d5edf097fa87367098c5f84c9f1c4255a513a3effc23c56b

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