Malicious PDF — malware analysis report

Static analysis result for SHA-256 df52f55059aac387…

MALICIOUS

PDF

46.4 KB Created: 2021-06-10 23:39:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5ff852aca753cb8937e2dcc71e41beb9 SHA-1: 72dbabeab97f93a84fc3aa56c0417a53beeb1dd0 SHA-256: df52f55059aac3873db6c96a1d13180e311c2e8dc774e6062cbb39d168897197
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures related to game hacks and free generators. The embedded URL, https://netcdn.tw/app/431946152/robux-hack-2021-android-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to a malicious site, likely for further exploitation or phishing.

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/robux-hack-2021-android-game-hack In PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/hack-dragon-ball-z-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/account-stealing-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/free-robux-for-roblox-pc_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/how-can-you-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/roblox-protosmasher-free-download_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/roblox-free-items-obby_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/how-to-get-robux-fast-free_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/roblox-da-hood-hack-download_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/free-roblox-hacks-like-jjsploits_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/hack-tool-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/admin-console-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/roblox-immortal-hack-blood-of-iron_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/como-hackear-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/oprewards-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/hacks-for-mm2-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/free-25-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/free-clothes-for-roblox-and-no-survey-or-download_GM431946152.pdfIn PDF document text
    • http://elearning.mas.aljihad.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-february_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000537c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x537C 26748 bytes
SHA-256: 3bee7ec136aea7eaf3627c6a65ffeb22f0354b321d19ecf22571fb21f6b1a8b1
font_01_sfnt_off000090e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90E5 18944 bytes
SHA-256: 83590aaf6f04d6293b78acc33c4a1502a0faae7ff464ffeb5355b8d3a93a6b34

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