Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de12819df9b6101…

MALICIOUS

PDF

46.4 KB Created: 2021-06-08 22:55:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 470b7ec7b3856f9c25b05f651c743304 SHA-1: 72a4941bbaaff0c5e25fabe5f5c5a08a429d405c SHA-256: 7de12819df9b6101feda561f0f86e207b15b2b4578136ad767b48618e6cafc73
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'hacks' for popular games. The primary lure URL, https://netcdn.tw/app/431946152/roblox-hack-boku-no-game-hack, is flagged as malicious. The document body, though partially corrupted, contains references to game hacks and URLs, reinforcing the lure. The presence of a download button heuristic further supports the malicious intent of directing users to external, untrusted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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 https://netcdn.tw/app/431946152/roblox-hack-boku-no-game-hack In PDF document text
    • http://apcupschennai.com/images/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://apcupschennai.com/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/pubg-uc-buy-in-pakistan-jazz-cash_GM1330123889.pdfIn PDF document text
    • http://apcupschennai.com/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://apcupschennai.com/images/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/picture-roblox_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://apcupschennai.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e08.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E08 25220 bytes
SHA-256: 7594ec9e4b289b0ebe3c86dd38985884e6b2329759991bc2cd71df9fbcc3a939
font_01_sfnt_off0000886e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x886E 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00009230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9230 18320 bytes
SHA-256: 026a3e6ea92e1d7259b83fb9b887db97c7d2d97846d19a6b34937f017c2e8871

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