Malicious PDF — malware analysis report

Static analysis result for SHA-256 2216a28b79e65032…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 20:36:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0cae65e5c32fea4f8993b6077afb38e4 SHA-1: ccc86605b80145f4a3b54886928aee7a8c7c4677 SHA-256: 2216a28b79e650325462496080c254236d2b3262b56fe83fd8038e8fe2bc0c1e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The document body and extracted URLs reinforce this, pointing towards a phishing or scam attempt to trick users into visiting malicious sites. No scripts were extracted, but the primary attack vector is the embedded malicious link.

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/431946152/www-robux-redeem-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-roblox-jailbreak-774_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-hack-2021-working_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-menu-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/pagina-para-hack-en-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-one-punch-man-cheat-engin_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-account-roblox-2021-obc_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-for-ninja-legends-roblox-download_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/get-free-robux-pc-and-mobile_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-group-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/robux-money_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-fly-hack-in-roblox-prison-life_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
font_00_sfnt_off00002f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F74 22408 bytes
SHA-256: 240482b5c9c4b958267262396d2e2a67a1cc338105fad6bc62be8374fd3ec0f8
font_01_sfnt_off0000617b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617B 19348 bytes
SHA-256: e5280512b7610ecbe9f35059f51f4ace511a0f2c0ebbedb7d74ee2ccbb0f8402

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