Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd44406ba0d53b3…

MALICIOUS

PDF

34.3 KB Created: 2021-06-29 11:46:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c03933a067fdf7c067088679057d3bc2 SHA-1: e42dd7ff1b0d0ac0d122ec83efaf503a70533905 SHA-256: cbd44406ba0d53b3d815ec51d4b86dae755aa17a285085fe876f5df6ba361966
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and free currency, embedding multiple links that redirect to malicious infrastructure. The primary redirector URL is http://netcdn.co/app/431946152/free-robux-birthday-hack-game-hack. While no scripts were extracted, the document's structure and embedded URLs strongly indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

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/free-robux-birthday-hack-game-hack In PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-group-favorite-follow-bot-free_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/cheat-roblox-tower-defense_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/april-1-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/gaming-cheats-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-apk-free-download-pc_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-1-million-in-jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/hack-roblox-robux-jailbreak_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-exploits-hack-one-piece-millennium-roblox_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/obby-for-free-robux-real_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-does-roblox-get-hacked_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/https-ninja-hack-club-roblox_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-robux-in-a-sec_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_off00002f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F19 21920 bytes
SHA-256: 4aa20133295e31414d1d8a40b86fc749d52a7af34702776009267504c9220ca5
font_01_sfnt_off00005f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6D 19632 bytes
SHA-256: ab65e817458760b39cf4995d184901c69d86819e05b305320c47cbad1b225545

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