Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9eed545f29456f…

MALICIOUS

PDF

34.5 KB Created: 2021-07-09 01:05:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e7bc5bd79a25a9e998fea2aa50256763 SHA-1: 6729f4a6419b427d308cf25c5155963f6019f611 SHA-256: 2a9eed545f29456f343a20f630bc5f2a1af274c2b57db737d18757e90692401e
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 free game items and hacks. The primary redirector URL is http://netcdn.tw/app/479516143/how-to-get-free-minecraft-alts-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving traffic to potentially malicious sites, likely for credential harvesting or further malware delivery.

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.tw/app/479516143/how-to-get-free-minecraft-alts-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-money-in-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/elite-roblox-hackers_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-hack-created-by-robuxian_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/serveur-roblox-avec-admin-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/are-games-on-roblox-free-to-make_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-auxify_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-printable-roblox-valentines_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/the-conquerors-roblox-pre-hacked_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-computers-in-flee-the-facility-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/roblox-g_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/watch-ads-for-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_off00003224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3224 22612 bytes
SHA-256: f553e2c74be56b7d33e952d50fa5ab9fb2e9514ad4a3cd9404a3d0f4f568262a
font_01_sfnt_off00006482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6482 18236 bytes
SHA-256: b23ed6ce0ca733f116ae3beec971ebaf347d03699ca21073755e7934a033f126

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