Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38873512d4e0a27…

MALICIOUS

PDF

47.6 KB Created: 2021-06-09 16:17:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7b63267128314c4a71493ff0afb8fc0c SHA-1: f8ace2f7671c99ee8a3702bf3d9aa44c0ed95068 SHA-256: c38873512d4e0a277311683f78fd07d23e1038b1bacc887262191398f578e60b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generator' or 'game hack' lures. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary attack pattern involves tricking the user into visiting these malicious sites, likely to download further malware or engage in phishing.

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.tw/app/431946152/free-robux-hack-without-email-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/hacks-abd-tricks-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-unlimited-xp-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-install-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-page_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spin-coin-master-2021-link_GM406889139.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
font_00_sfnt_off0000515c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x515C 24512 bytes
SHA-256: 6e2127712bfb2c8a88394612a923188099b07ebe04d423f6452d407de73b65c0
font_01_sfnt_off000087d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D5 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000947d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x947D 19332 bytes
SHA-256: 20f0323af342fa5c1493a735dab6ade8fc08fd63d8b369e04b6f3bc13132e929

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