Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2acc0d0d03cc069…

MALICIOUS

PDF

43.9 KB Created: 2021-06-08 22:55:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bb1ed1a617ecfed3ce7f4fe940818f6d SHA-1: 6ac7233891402c95d2265ca9d64bc31c19648100 SHA-256: a2acc0d0d03cc069e76b6a7d1f7aa6362a6a7e522595291bcd8ba4be1e2fa0be
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating a malicious redirector lure, specifically referencing 'free generator / game hack' content. The embedded URL, https://netcdn.tw/app/431946152/free-roblox-cads-game-hack, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and appears to be designed to trick users into clicking it.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/free-roblox-cads-game-hack In PDF document text
    • https://www.planetzoe.hr/files/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/krnl-roblox_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://planetzoe.hr/files/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • https://planetzoe.hr/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://planetzoe.hr/files/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://www.planetzoe.hr/files/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://www.planetzoe.hr/files/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • https://planetzoe.hr/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/abd-roblox_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/roblox-jailbreak-get-free-money_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/minecraft-pe-hacks_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F43 25000 bytes
SHA-256: e3f4142375e3e30fae49fd01c4cb28e03d62a04da80e24ec1508e3c7f3e0bf2c
font_01_sfnt_off0000889e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x889E 18348 bytes
SHA-256: 903f306892d85e671743a110baddbe99520b28b654362b7490d4e6d268663c74

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