Malicious PDF — malware analysis report

Static analysis result for SHA-256 001d302c8f3a6644…

MALICIOUS

PDF

37.5 KB Created: 2021-07-06 03:48:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7c91f0f256eb046d1b5c9ebab2a989c8 SHA-1: 49e4b24a9df19d53afc1e0753d4f8852f40aeb5d SHA-256: 001d302c8f3a6644998189e50ea12b3beed12120dba3dc1009359e3f9c975896
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as game hacks and free currency generators for popular games like Coin Master and Roblox. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-free-spins-link-quora-game-hack. The document's structure and embedded links strongly suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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.tw/app/406889139/coin-master-free-spins-link-quora-game-hack In PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/change-the-amount-of-anything-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hack-free-download-pc_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-description_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-jailbreak-noob-vs-pro-vs-hacker_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/robux-hack-me-com_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/80-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/windows-10-minecraft-free-with-java_GM479516143.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_002_off00002f90.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F90 23524 bytes
SHA-256: e0289cce10ae172baddcd809ac6ce3d0abea389b39ab37218d163b75c314f4fc
font_01_sfnt_off000064d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D4 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB9 18640 bytes
SHA-256: 854813a0d1d296087869f9650f2c8127593c4544be73c34457aa680c0b691141

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