Malicious PDF — malware analysis report

Static analysis result for SHA-256 c70e8198c8d8ad57…

MALICIOUS

PDF

44.8 KB Created: 2021-06-11 08:26:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 490d33cbca437f4e6454cb7b3e2b4d75 SHA-1: c4aad7aaa61ff3637986d76f3ebc3f64cb8783d9 SHA-256: c70e8198c8d8ad5782773cca567fc1df8f800d46aeb7d1b56307f37114b87aa3
122 Risk Score

Malware Insights

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

The PDF document uses a lure of game hacks and free currency to trick users into clicking malicious links, as indicated by the 'free generator / game hack' redirector heuristic and the fake CAPTCHA prompt. The document body contains multiple URLs pointing to external sites, likely serving as download or exploit hosts. No scripts were extracted, but the PDF structure itself is exploited to present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/descargar-hack-de-robux-para-roblox-2021-game-hack PDF link annotation
    • https://tjiko.de/wp-content/uploads/fsqm-files/glitch-free-robux_GM431946152.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/what-if-every-item-on-roblox-was-for-free_GM431946152.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/hack-de-robuxs-2021_GM431946152.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/roblox-free-robux-hack-android_GM431946152.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/get-free-robux-without-downloading-games-and-without-paying_GM431946152.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/tiktok-free-views_GM835599320.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/free-generator-codeorg-roblox_GM431946152.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/free-robux-and-bc-from-website-clone_GM431946152.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/rover-hack-roblox_GM431946152.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/how-to-give-items-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/how-to-get-free-gamepasses-roblox-2021_GM431946152.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/how-to-hack-any-user-in-roblox_GM431946152.pdfIn PDF document text
    • https://tjiko.de/wp-content/uploads/fsqm-files/como-hacker-el-server-de-naruto-final-bond-roblox_GM431946152.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000500c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500C 25316 bytes
SHA-256: 23d8bb61af60d6727d4c76bf2572d21ca34d0216a9ff884671cf58e0d3dbc525
font_01_sfnt_off0000890d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x890D 19332 bytes
SHA-256: 68172e50387efb10de152c2a347fd5a2d3f34d71507c51d3440d727b9e50052c

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