Malicious PDF — malware analysis report

Static analysis result for SHA-256 141a1ea0b49580ab…

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 22:56:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3b5c1edae9482876216961add3d1e869 SHA-1: 88427f1b342db81ec85adf3c6ce3f5a1b27d9fd9 SHA-256: 141a1ea0b49580abc4d5e02bae6a0446a6e7b433ac829ebe8f6288062049fa0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to a known malicious domain, disguised as a game hack or free spins generator. The ML classifier also flagged this PDF as malicious. The document body contains text related to 'free generator / game hack' and 'free spins', reinforcing the lure. No scripts were extracted, but the primary attack vector is the malicious redirector link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/stock-speed-coin-master-free-spins-game-hack In PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-cheat-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/tiktok-free-package_GM835599320.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/real-roblox_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/is-pokemon-go-community-day-free_GM1094591345.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/heroes-online-roblox_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_off00004edd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EDD 27748 bytes
SHA-256: 067a67da34a3d0e19c4431dd0bd48444ed9e182b11ca050fca24fc261eabe92d
font_01_sfnt_off00008e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5C 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off0000980e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x980E 18228 bytes
SHA-256: 0912f0786cfda3eb3f4ec59ad0423aa1ca94e0fc281419103cd3a9ceac43c1d0

Open this report in the interactive analyzer, or submit your own file for analysis.