Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f7e90994027b1a…

MALICIOUS

PDF

34.7 KB Created: 2021-06-26 01:20:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1caaad4463fb437b7329fb06cf7afebc SHA-1: 037d61de840141e08bce11e8148d0de805e1f388 SHA-256: 50f7e90994027b1ac0380e83ae076cb22570f84a723ac5fe8ffe4c91155439d9
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a lure of free in-game items and hacks to trick users into clicking malicious links. It presents a fake CAPTCHA or human verification prompt, which is a common tactic to coerce users into interacting with the malicious content. The primary malicious link identified is http://netcdn.co/app/431946152/roblox-free-headphones-2021-game-hack, which likely leads to further malicious activity.

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.
  • 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 http://netcdn.co/app/431946152/roblox-free-headphones-2021-game-hack In PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/claim-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/robux-free-giveaway-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/giving-people-free-robux-live-stream_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/good-roblox-hack-reddit_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/roblox-dumb-smart-cheater_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/tiktok-free-folowers-4tiktok-site_GM835599320.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-1-billion-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/autodraw-free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/roblox-rc7-hack-scripts-lumber-tycoon_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-free-cool-clothes_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
font_00_sfnt_off000031dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DC 21476 bytes
SHA-256: 89625ade3fb5d8b26aaa6b5fe660cd2c7110a33167adc2f9cfb13ae05b267388
font_01_sfnt_off000060dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DD 19568 bytes
SHA-256: 0344b90a52d3f2e0f8faf0a68f695f915c60aa3a86cefb2952cb74dd6719ea59

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