Malicious PDF — malware analysis report

Static analysis result for SHA-256 147d65c1c7b56914…

MALICIOUS

PDF

42.0 KB Created: 2021-05-11 13:04:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 29b0292d3e78354af6a36789517581c4 SHA-1: dad1c001d8de18cd7ff53ad1ce2fe30b1315d786 SHA-256: 147d65c1c7b56914cbe93ed6ff3de6344c18044f2ca3edb91d2c056e3847c992
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_GAME_HACK_REDIRECT_LURE' heuristics. The document body and extracted URLs suggest a lure related to game hacks and free currency, aiming to trick users into visiting potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coinmasterfreespinlink-game-hack In PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/robux-robux_GM431946152.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/roblox-demon_GM431946152.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/roblox-data-breach_GM431946152.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/free-bobux_GM431946152.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/coin-blogspot_GM406889139.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/spin-coin_GM406889139.pdfIn PDF document text
    • https://man1bengkulu.xyz/__statics/gudangsoal/files/how-to-get-free-robux_GM431946152.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_003_off0000499f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499F 25116 bytes
SHA-256: 41afd1ce49d663135a2690463ff837c2337f6fa405573cfcbfb282ee34957238
font_01_sfnt_off000081eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EB 18224 bytes
SHA-256: 5ac1ce2ac88e7b98134a23e8a83b406c8e40c127b2dbab09a4edbea00c7c47cb

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