Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3f852f9c0ab0f2…

MALICIOUS

PDF

47.7 KB Created: 2021-06-07 08:20:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: df29ecbe7ce9203bd088cb91e8a88d4f SHA-1: 569bddabe8cc774e568f76cbe55c1e5f31c8fda6 SHA-256: 0a3f852f9c0ab0f288a8d4803303ec5c429cae86399310cb5a90c3f1e40af3c0
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 generator / game hack' lures. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the lure suggest an attempt to direct users to a site that likely hosts phishing content or downloads further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/a-promo-code-that-gives-us-free-robux-no-waiting-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004d4f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D4F 24584 bytes
SHA-256: 492ce0506370361391b7897d0acaae959def51634d76187b47902a92c45dfee4
font_01_sfnt_off000085d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D2 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9279 20008 bytes
SHA-256: 2c76e0df942aff905eefacfeec7dfdd9d87c81f46dffb9d9220ecb5f7c42147e

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