Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec389472b304836…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 16:41:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f2f846ee407d501631cc1c6f40a0aa6e SHA-1: 081a5bdbe3eb01c6d81c4d317a018d266ca4dc7e SHA-256: 9ec389472b304836a59446568dd1b399937211600d618a373aba2ab26dc1484c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a game hack redirector lure, directing users to a malicious URL. The document body and embedded URLs reinforce this lure, aiming to trick users into downloading a payload. The ML classifier also flagged this PDF as malicious with high confidence.

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/431946152/hack-para-android-roblox-game-hack In PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-robux-hack-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-roblox-hacks-with-no-offer_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-world-hack_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-game_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/identity-fraud-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/hack-para-android-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-speed-change-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3E 22600 bytes
SHA-256: e260fa96685b8c9275bc79f1fd2c45c24c6c04322a5af4145aff43b1973194f4
font_01_sfnt_off000061af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AF 19104 bytes
SHA-256: 6930aaab2344da534d7332060c6444e2afde577093d84c5a222213c12e0f1fe5

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