Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2a71116556b5ed…

MALICIOUS

PDF

34.3 KB Created: 2021-07-01 01:47:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 64b772e2c26fefdf4f35d89094d91b99 SHA-1: 814b02e2c871b1b89c0ff53c4091b5a10abbf7b8 SHA-256: 2b2a71116556b5ed492ae9b32a532a0cf82d56b28e7e47b5bae33aaa94717222
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, specifically http://netcdn.co/app/431946152/free-robux-picture-verification-game-hack, which is designed to lure users with promises of free in-game currency or hacks. The document body and embedded URLs reinforce this lure, indicating a phishing or scam attempt. No scripts were extracted, but the presence of malicious links and the lure strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/free-robux-picture-verification-game-hack In PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-get-free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-pastebin-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/script-roblox-pet-simulator-hack_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/injector-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-a-gamepass-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-survey_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-vetement-roblox_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_off00002f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2D 22084 bytes
SHA-256: db0612bae3309ec5422f2a3a68275b80c93a1170ef6b347cba6a22316672c3c2
font_01_sfnt_off00006063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6063 19228 bytes
SHA-256: f240099ec94a3952d002d5cd7f1fa72b0c4930db4b6327e4aabbfeba5b3d54ac

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