Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a11edac977dfdd…

MALICIOUS

PDF

45.9 KB Created: 2021-06-11 11:00:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 560147ba393412cfd319c4757c4e0ae0 SHA-1: aa1336f4fa88797c6a25ab97112fd0cab0c76560 SHA-256: 46a11edac977dfdd8cb4b36e63167b81b9b4d4846eeb0df160eb793b3568bfc1
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The document body and heuristics indicate a strong intent to trick the user into clicking these links, which likely lead to further malicious content or downloads. The presence of a 'password-protected archive' lure suggests an attempt to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/431946152/easy-robux-hack-game-hack In PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/a-code-that-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/hacks-for-roblox-admin_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/hacking-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-roblox-login-name-and-password_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-free-wings_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-hack-any-tycoon-on-roblox-2021_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_off00004ef1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EF1 24080 bytes
SHA-256: 95925b7613b47df2aa48cf563e49b2dd3418dd332a49128f7f2592a4caed3a46
font_01_sfnt_off000085fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85FC 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00008fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBE 18428 bytes
SHA-256: 2bceebe5c1993dbcd4316f947943b347169ed843d74f7d3766fe916d90107923

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