Malicious PDF — malware analysis report

Static analysis result for SHA-256 24b3cf045fafcb4b…

MALICIOUS

PDF

42.5 KB Created: 2021-05-18 00:01:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e34844aeaf13ba2aed02868c1e9bc78e SHA-1: d4a5ff98623c80e6fdc7e20d65106feff5dd4e26 SHA-256: 24b3cf045fafcb4b792b4ddcfb5ec531b2a0427d7230e61126079b9fd594385b
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including a known malicious redirector, under the guise of providing free game resources. The document body and heuristics indicate a lure for users to click these links, which likely leads to phishing pages or further malware downloads. No scripts were extracted, but the embedded URLs and redirector activity strongly suggest a malicious intent to compromise users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-and-coins-2021-game-hack In PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2kotamagelang.sch.id/__statics/gudangsoal/files/coin-master-free-in-app-purchases_GM406889139.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_off00004b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B33 24436 bytes
SHA-256: 951693053f60eef17af15a7223a09c60039ba24680e9fc36ce2fa115bd149dfc
font_01_sfnt_off000081c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C0 18884 bytes
SHA-256: 183333dfce930995a9382150b407cb528e1a5d3dc22f511d9bca322a4b29e614

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