Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b3c07cda861a1e…

MALICIOUS

PDF

49.0 KB Created: 2021-06-08 02:08:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 65637a857fb61f89298f365fba4170a2 SHA-1: 7e67078844598162ab07a93a0f9c1c974fc9a4d4 SHA-256: 20b3c07cda861a1e7f2fb91f2311afe15615ce36399e192d47ed26a923dfcc7e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for free game items, directing users to a URL associated with known malicious redirectors. This suggests a phishing or scam campaign aimed at tricking users into visiting potentially harmful sites. The document's structure and embedded links indicate an attempt to lead the user through a chain of redirects, likely to a final payload or exploit page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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-roblox-catalog-items-game-hack In PDF document text
    • http://lawpatron.ru/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/free-roblox-rs_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lawpatron.ru/images/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/roblox-download_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://lawpatron.ru/images/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/descargar-roblox-hack-robux-infinitos_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/inf-health-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/free-robux-videos_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_off00004fc1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC1 27900 bytes
SHA-256: dc20ce97e9a24cbb45733a08979bd8fd040bdad2e8b60d7d2d47fbd92ad6f144
font_01_sfnt_off00009094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9094 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7E 18992 bytes
SHA-256: 30ad89f024e991802d6fe6a38147a6ca2f8986681c6657ea0834d7ae939d9fa1