Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56133cd50da03f7…

MALICIOUS

PDF

46.3 KB Created: 2021-06-09 16:28:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 23d47554c97115f32f3c6434b267c1b1 SHA-1: 4eb67c9a0f93ae971856e9afe68075c9d69f848a SHA-256: f56133cd50da03f7f7436d98589cc6992f865fdd37234cb83f43bb8e8c7e6f58
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as a game hack or generator. The document body, though partially garbled, contains the primary malicious URL. The presence of multiple redirector links and the ML classifier strongly indicate malicious intent, likely to lead the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/how-to-follow-a-player-everywhere-he-goes-roblox-hack-game-hack In PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/hacks-for-legends-of-speed-roblox-download-pc_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/roblox-jailbreak-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/roblox-vpn-free_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/get-any-roblox-item-free_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/como-hackear-roblox-con-cheat-engine-68_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/how-to-get-1-000-000-robux-free_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/cheap-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005365.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5365 27604 bytes
SHA-256: e9399415eb03cc56b0f751ccfb219d1e1e141d0082b557b1d02cbb3759b56918
font_01_sfnt_off0000902a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x902A 19124 bytes
SHA-256: 272a3b5a35c15e00de6b2963089febbc144dedc2f5b4761662e7988a7b35a2fa

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