Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf3d53d403fe33b…

MALICIOUS

PDF

34.8 KB Created: 2021-07-02 07:12:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d947bd961b80332dff83bcd618c40861 SHA-1: 147f4c4b1176498a4a496b31bf990d98ff7bef95 SHA-256: 3cf3d53d403fe33b1c559af35d52be375c4cfbd3973c96008c95718be51607ce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-ro-boxing-hack-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into downloading further malicious content.

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/roblox-ro-boxing-hack-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coins-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-pet-simulator-lua-script-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/this-server-is-hacked-sound-id-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cheat-files-download-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/admin-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-best-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-no-vertification-no-survey-no-pasword_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-no-pass-requiredfor-pc_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000319c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319C 22424 bytes
SHA-256: 2945fccb439fa3f60280df8558762bd807062dd81d897283c1c2b631af84a38f
font_01_sfnt_off000063a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A0 18776 bytes
SHA-256: 5dc1f973e9aabf305baa65720fe72ad7850a17fa0efdae064111810d1334f1d2

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