Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f931d30edfe91a4…

MALICIOUS

PDF

35.6 KB Created: 2021-07-09 18:44:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e0ba5fb875d01d108585218449156733 SHA-1: 8c55184a03592083854998fb0c868531ded67993 SHA-256: 0f931d30edfe91a44c0a11ab66bb19628343161d1cbfc24f88a89134fdfba8a7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary lure URL is http://netcdn.tw/app/431946152/easy-way-to-get-free-robux-game-hack, which is flagged as a malicious redirector. The document body and embedded links suggest a social engineering tactic to trick users into visiting these sites, likely leading to 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/easy-way-to-get-free-robux-game-hack In PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/pubg-uc-new-freepik_GM1330123889.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/trurkey-hack-roblox_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/how-to-use-a-exploit-in-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/100-robux_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/website-roblox-cheat-new_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/free-roblox-gift-crafts_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/comment-avoir-un-cheat-sur-roblox-franais-gratuit_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/free-catalog-roblox-script_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_off00003393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3393 22472 bytes
SHA-256: 2418957e18616124e19d794b002a345cfe3c95c1d98189eea403b7963bbe4d76
font_01_sfnt_off00006585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6585 19196 bytes
SHA-256: 64e8f018724e62164b0ada1d77f482f882d8547e2dcd2accc6d14ba4748306e9

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