Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f2920b79af7919…

MALICIOUS

PDF

34.8 KB Created: 2021-07-01 09:24:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a639e11afb98036bb278049290284639 SHA-1: 65d822b45175c9918cfe2c069a2a3d1aa78557a1 SHA-256: b3f2920b79af7919829ba5a5e06a7d4d3ff298d310269818a421abb7e7c52cea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'free generators' for popular games like Roblox and Coin Master. The document body and embedded URLs strongly suggest a lure for users seeking cheats or in-game currency. The primary malicious activity observed is the redirection to potentially harmful websites, likely for phishing or malware distribution.

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-hack-roblox-games-no-download-game-hack In PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/download-game-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/enter-this-secret-code-for-5m-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/getrobux-come_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-prsion-life-hacks_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-model-roblox-broke-game_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/hack-avatar-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-a-free-hat-2021-roblox_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/how-to-download-wurst_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
font_00_sfnt_off00003063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3063 22172 bytes
SHA-256: 027d51fb1409e432c58f6a3afa48236525599602bd78dd23142f970e18eb6ba7
font_01_sfnt_off000061a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A5 19424 bytes
SHA-256: 2d4531dac87decc89d6481cd977550af359a401d565865dc67149d6ba37967b8

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