Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b99dbd5fffea34c…

MALICIOUS

PDF

34.1 KB Created: 2021-06-27 21:13:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ef0bd79172d9689d96f63bd32e6a27ec SHA-1: dfa90925a2f1d83d1153195b4ad01b5166c9b07e SHA-256: 2b99dbd5fffea34ca509268d195b90bb4511c63758d2afbf4c5584969e07d553
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and sites offering game hacks and free currency, indicating a phishing or scam attempt. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks. Although no scripts were explicitly extracted, the document's structure and embedded URLs suggest it's designed to trick users into visiting malicious sites, likely as part of a spearphishing campaign.

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.co/app/431946152/how-to-get-free-stuff-on-roblox-games-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/commen-avoir-robux-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-roblox-admin-codes_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/robux-secret-forum-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-god-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-on-android-tablet_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/robux-hack-tool-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-roblox-beanie_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-menu-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/easiest-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/sharkblox-trash-gang-shirt-free-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-can-you-get-robux-for-free-on-roblox_GM431946152.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
font_00_sfnt_off00002f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F25 21880 bytes
SHA-256: 9346616d00b15a34a7c8910d00b7f1e6f738d7f80a54c73956572a6fbc41a69f
font_01_sfnt_off00005f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3F 19320 bytes
SHA-256: 2ac41425a19ea4e8274c4631257c78bff36211087b7260ac2aadc58a9e722410

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