Malicious PDF — malware analysis report

Static analysis result for SHA-256 09fa2736a51fbb85…

MALICIOUS

PDF

35.9 KB Created: 2021-07-03 17:12:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fb64055e99b192adfc2bc3ec9c3070d3 SHA-1: e11f863f20f8365471100d73469a086e3e703e30 SHA-256: 09fa2736a51fbb857e5e91333b63f5ab724a82cc0b2a8956ed5fceae07fbf3d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to known malicious infrastructure, specifically promoting game hacks and free currency lures. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks. Although no scripts were explicitly extracted, the document body and embedded URLs strongly suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-link-spin-game-hack In PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-admin-in-every-roblox-game_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-aidain_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-robux-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/best-roblox-games-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-lets-play-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-com-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/robux-rbx-calc-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/weird-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-hack-robux-windows-10_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-no-verivaction_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/get-free-robloxgg_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-items-to-sell_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-kick-someone-in-free-draw-2-roblox_GM431946152.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_002_off000036ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36EF 22880 bytes
SHA-256: 3052f6058779dc1d381d96beebe303256d5b95ce8b37bd7a94fa2a180b5a62aa
font_01_sfnt_off000069ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EF 18180 bytes
SHA-256: accd6e67d97fb62f461d44488d0438595f4e2a81ab0ce48d14b069d0d100ad1e

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