Malicious PDF — malware analysis report

Static analysis result for SHA-256 b149866f7932cd62…

MALICIOUS

PDF

35.6 KB Created: 2021-07-06 03:34:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 13c05772273a840556fb448d6294d2a5 SHA-1: 64fa633d9cb32a2590362c80b238b4c148fdf972 SHA-256: b149866f7932cd62da3831d7223f2b0b6dd88f73258caa7789dd4a6792659d70
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure URL is http://netcdn.tw/app/431946152/uprobuxcom-free-robux-game-hack, which is flagged as a known malicious redirector. The document body and heuristics confirm the intent to trick users into clicking these links, likely leading to further malware downloads or phishing attempts.

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.tw/app/431946152/uprobuxcom-free-robux-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/play-roblox-for-free-without-signing-in_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-pastebin-stuff_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/cool-roblox-skins-for-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-for-roblox-project-pokemon_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-2021-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-twitter-codes_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-prison-life-hack-donload_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-do-you-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/comment-hacker-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-glasses-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/old-roblox-play-for-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-become-headless-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3237 22984 bytes
SHA-256: 714408909c10e21697b46c7ccfbba00907af2564b116ea83268cee8557e9a372
font_01_sfnt_off000065dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DC 19152 bytes
SHA-256: 77e1d77af257f2799f450e4aedc0e1b3eb2c97b8c20e190c5e1e9f2e5b207ac7

Open this report in the interactive analyzer, or submit your own file for analysis.