Malicious PDF — malware analysis report

Static analysis result for SHA-256 41adc840e8b50a57…

MALICIOUS

PDF

34.7 KB Created: 2021-06-29 06:44:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 513d4b1c603477bed414c08b89068879 SHA-1: 0ef646655ca9fe41e77df0a8ed77af296ca55c31 SHA-256: 41adc840e8b50a5776a03e56d1d9192162b7df2a55d3d679c5158b52217b30b0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as free game hacks or generators. The primary lure URL is http://netcdn.co/app/431946152/free-black-clover-roblox-accesories-game-hack, which is associated with known malicious redirectors. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting these sites, 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.co/app/431946152/free-black-clover-roblox-accesories-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/hack-para-simon-says-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/when-will-vesteria-beta-be-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/rosie-hacks-caillous-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-cheat-engine-table-08-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-hack-100-works-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-nicster_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-shirt-maker_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-robux-trick_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/v3rmillion-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-onto-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-dominus-messor-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-electric-state-darkrp-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-earn-robux_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_off00002fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC1 22728 bytes
SHA-256: 30c6383b9d06ddca0127eb3b3064740e56f93e39ec05ea39b11654748766330c
font_01_sfnt_off0000629d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629D 19052 bytes
SHA-256: e08431411fc2c175e0adf6399f6dcf3da5cdeee535680bc2a9a2a5b8e90776bb

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