Malicious PDF — malware analysis report

Static analysis result for SHA-256 78cad6e55ca56602…

MALICIOUS

PDF

46.7 KB Created: 2021-06-08 18:44:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9a692ea9d52cb6a9d641c321e1f550bc SHA-1: 0a4564da6dbf428e8c554652afdf8e3a2a5a1c47 SHA-256: 78cad6e55ca56602f85646a1eaa8af7cb5afef04ac78c226e3a79a655515b28e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators' to entice users. The primary lure URL is https://netcdn.tw/app/431946152/how-to-bypass-the-roblox-cheat-engine-bypass-game-hack, which is designed to trick users into downloading a malicious payload. The document body and embedded URLs strongly suggest a social engineering tactic to facilitate the download of malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/how-to-bypass-the-roblox-cheat-engine-bypass-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/pubg-uc-full-form_GM1330123889.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/pubg-2021-uc_GM1330123889.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-cp_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/tiktok-free-6-months_GM835599320.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-generator-no-human-verification-or-surveys_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_off00004fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEF 28224 bytes
SHA-256: 4a293ff5baf19459b0a1e46751a3108074a4ce3ff3e15f2992600fd5cb1c3123
font_01_sfnt_off00009122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9122 19212 bytes
SHA-256: abd6abd21099b66d365932e733d6d1ec9c56dea882b30069c4d514fab90c68a7

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