Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47b92ba933c3182…

MALICIOUS

PDF

50.2 KB Created: 2021-06-07 17:33:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a2b9f3f8a580d31bdb1273ae72528ce4 SHA-1: e93c1fbb451fadb04b62f2f3806e26b1bfeb5774 SHA-256: b47b92ba933c3182aeccbf03e59096cb8de1dc45bd49bf9258429a323a8959bb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as free game hacks and generators. The primary link, https://netcdn.tw/app/431946152/no-virus-hack-roblox-game-hack, is identified as a malicious redirector. The document's structure and embedded links strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/no-virus-hack-roblox-game-hack In PDF document text
    • http://bildhauerei-roerig.de/images/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/robux-earner_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-gold-cards-for-coin-master_GM406889139.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
stream_004_off000053a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53A5 35600 bytes
SHA-256: b2b3fc85628bad840dbf6af7cc6689503d3955d8b828d12fe532b6b84c1304d1
font_01_sfnt_off0000a118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA118 18576 bytes
SHA-256: 19b93f7573c765038a7c64e132a20bb5c897a26630bcbfc6170d3d6ff45c0ce9

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