Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff154bd84936e96e…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 09:26:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6f13749583238aeed6fe4e397352abf1 SHA-1: d2ec777e2bb4f36296f8acaa6a81b72373cbd713 SHA-256: ff154bd84936e96e6e37212616e756cd20012cd49de618f9928eb547ac27254d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them, promising free game items or currency. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. The document body and extracted URLs strongly suggest a social engineering tactic to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/free-robux-no-verification-game-hack In PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/can-i-get-a-hacked-roblox-account-back-without-email_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/free-roblox-wallhack-download_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/5-roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/how-to-get-free-items-on-roblox-2021-no-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/free-robux-copy-and-paste-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/free-roblox-admin-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/roblox-girl-clothes-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/ben-ten-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/make-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/free-robux-cheats-card-codes-showing_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_off00003103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3103 21796 bytes
SHA-256: d4a195516857d4e79003d6dea77d6d803e7dae048e4e32381ab9dad573f21ed1
font_01_sfnt_off00006115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6115 19072 bytes
SHA-256: ace71d10471f941b47a74757ee9bffc2eb087028e16fd0b67ae59ecc13578840

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