Malicious PDF — malware analysis report

Static analysis result for SHA-256 43bf87057dd9bb3d…

MALICIOUS

PDF

35.5 KB Created: 2021-07-01 09:59:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bb2a83864ab34c8c6d60578c19978ac8 SHA-1: 574b7303da179fb5671f9c6aa09b4ea63545f01c SHA-256: 43bf87057dd9bb3de628b604f3640afe1acbbf642518d9551ba1435888356897
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The document body and embedded URLs suggest a lure for users seeking cheats or in-game currency, which is a common social engineering tactic. The presence of 'LOLBin run command' heuristics indicates potential for command execution, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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-zombie-animation-for-free-roblox-game-hack In PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-robux-that-uses-rechachapa_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/cheats-for-roblox-pokemon-brick-bronze_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-catalg-on-roblox-pa_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-hack-roblox-in-jailbreak_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/hack-roblox-tools-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-system32-host-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-assassin-money-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/cheat-engine-scripts-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-hack-roblox-accounts-2021-using-cmd_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-roblox-promo-codes-march-21-2021-twitter_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-roblox-items-for-free-2021_GM431946152.pdfIn macro / runtime command snippet
    • http://pustaka.fkm.unand.ac.id/repository/hacks-for-fallen-that-actually-work-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/robux-hack-on-wish_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-airport-free-game_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-play-for-free-without-downloading_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-saber-simulator-hack-script_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-free-robux-legallz_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-hack-init_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/comment-avoir-des-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/gamekit-800-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repositorIn macro / runtime command snippet
    • 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_off00003193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3193 22760 bytes
SHA-256: 714d2e2491c39a6c25abe0e7f52b39c0a635ea9cb4d3c78862dda4f400f70e55
font_01_sfnt_off000064bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BB 19392 bytes
SHA-256: 28c8ed95642606b82ec80dedf3aa244d601e50b9d0d7d76c0019c1ab54adb6c7

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