Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eaa652a9f14cdc1…

MALICIOUS

PDF

55.3 KB Created: 2021-06-03 15:59:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bfad438fc144cfb8db1e1f1445c577e7 SHA-1: 16237d43128fe91952d76e992b4c90df9c69db44 SHA-256: 6eaa652a9f14cdc16166477b6ac178ac7b262a75e6f91dbb22af005dd5d84863
200 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a game hack redirect lure, specifically pointing to a URL associated with malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'Roblox Money Hack' and the malicious URL. The presence of a fake CAPTCHA heuristic further supports the social engineering aspect of this attack, aiming to trick users into interacting with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9358

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 https://netcdn.online/app/431946152/roblox-money-hack-game-hack In PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/robux-sites_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/robux-for-free-2021-no-vertification_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/get-verified-tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D2 33740 bytes
SHA-256: 3cfd69d094e33c0735dc425eeb78fc3c44ebc26d491b5821069beefe88037ba6
font_01_sfnt_off00009dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC5 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000a7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7AB 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000b4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4BD 18560 bytes
SHA-256: 2877ec179c3d1975899223932944ba0d35aae080e47210864d1f1454656c8d43

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