Malicious PDF — malware analysis report

Static analysis result for SHA-256 7096de1e34496459…

MALICIOUS

PDF

48.0 KB Created: 2021-06-09 01:53:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 973d8627fbe49399a5a6abcb6429ef3b SHA-1: 7deca7fac257cfcbe81f2941ce1457ceb6cfdbd8 SHA-256: 7096de1e34496459d5123d9ff64907676bc500e9498d06c753b1775a49ac5f05
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and free in-game items, presenting a fake CAPTCHA to trick users into interacting with malicious links. The document contains numerous links to external PDF files, many of which appear to be part of a link farm designed to improve SEO for scam-related content. The primary malicious URL identified is https://netcdn.tw/app/431946152/roblox-gift-card-codes-for-free-game-hack, which is flagged as a known malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/roblox-gift-card-codes-for-free-game-hack In PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/emirtus-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/friendly-face-free-robloxpgn_GM431946152.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/robux-robux-hack-code_GM431946152.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://elearning.min2bolmong.sch.id/__statics/gudangsoal/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://www.bandicam.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005534.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5534 25032 bytes
SHA-256: ad333765ff5f21d097023dfabdf862f5f6921a6b82c9ae9eacd6cbdd400f57da
font_01_sfnt_off00008e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E38 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off000097fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97FA 18572 bytes
SHA-256: fe8ffe77ac54c4362d0c210d12d95c7d4af502d120104193415965592d530fcf

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