Malicious PDF — malware analysis report

Static analysis result for SHA-256 146346a4309f596a…

MALICIOUS

PDF

35.2 KB Created: 2021-06-26 05:33:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 866a59e09e9bacc62d145294aaf30bb8 SHA-1: 6a7d21e82f560c7f76e4b856be2f17cf20d59cd9 SHA-256: 146346a4309f596a5906ff640e8257f8d7add8c6d5903aa1522d514e7e3d7d5c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically targeting users interested in game hacks like Roblox. The document body and embedded URLs reinforce this lure, directing users to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-do-you-hack-roblox-accounts-2021-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-unlimited-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-codes-2021-multiple-people-can-use_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-2021-robux-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-vidoe-star-egg-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/cod-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-no-verifacation-or-scam-mobile_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/hackear-juego-coin-master_GM406889139.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
font_00_sfnt_off00002fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBE 22616 bytes
SHA-256: f8727fcbf799bd21af5b5a6e12eafaa36a92236b0f6997165283712740e4b2e2
font_01_sfnt_off0000621d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621D 19796 bytes
SHA-256: bbba9e90c4175430560c423a2599f1703ad0d21752a62ae6a9dc8687470da0cb

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