Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9c5af24a840dea…

MALICIOUS

PDF

47.1 KB Created: 2021-06-10 21:48:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ff542e424dc3993ccde09bde8f080bee SHA-1: aff069193e547c921395bdd2b171f9f43f56a1b6 SHA-256: be9c5af24a840dea59ebf1687a6cd87e3b2b64849804651d372bf53aeaf65e52
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, specifically promoting 'free generator / game hack' lures. The primary URL, https://netcdn.tw/app/431946152/how-to-get-free-robux-from-bloxmarket-game-hack, is identified as a malicious redirector. This suggests the document's purpose is to lead users to potentially malicious websites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/how-to-get-free-robux-from-bloxmarket-game-hack In PDF document text
    • https://www.shin.ge/images/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • https://www.shin.ge/images/roblox-high-school-money-hack_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/free-robux-promotinal-codes_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.shin.ge/images/roblox-adopt-me-hack-all-items_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/coin-master-cards_GM406889139.pdfIn PDF document text
    • https://www.shin.ge/images/hack-roblox-knife-simulator_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/free-costume-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.shin.ge/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.shin.ge/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.shin.ge/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://www.shin.ge/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.shin.ge/images/minecraft-for-chromebook-free_GM479516143.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_off00005007.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5007 29720 bytes
SHA-256: 64f383bc4813eabeffcc6715c6bc2edc54f1ddedb6920acc4e8bddb809ea72a4
font_01_sfnt_off0000937e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x937E 19012 bytes
SHA-256: 8742ebc463cf1dc98ecbbd014a0c4649dc54716f370c645d9159342f59509bed

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