Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27f0704d58185e5…

MALICIOUS

PDF

34.3 KB Created: 2021-07-07 07:08:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: bb5e329f54f3dd0a8754d357315a73e8 SHA-1: 4860e9dd3f9741eacd873296ddc29d6ab0727843 SHA-256: b27f0704d58185e5d3e3b0e5c8e5b6018f9da900914602bc5dca8c9a1b432d57
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs that lead to known malicious redirectors and sites offering game hacks and cheats. The document body explicitly mentions 'Minecraft Pe Apk Download Free' and 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', indicating a lure for potentially unwanted software or malware. The ML classifier and specific PDF heuristics strongly indicate malicious intent.

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.tw/app/479516143/minecraft-pe-apk-download-free-015-0-game-hack In PDF document text
    • http://fishboat.hr/files/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/how-to-hack-a-roblox-account-password_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/hacks-for-roblox-for-craftwars_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-robux-generator-tool_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-robux-download-no-virus_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/how-to-do-the-sex-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-download-roblox-for-windows-10_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-hack-clothes-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-get-free-robux-on-roblox-2021_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
font_00_sfnt_off00002f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F75 21960 bytes
SHA-256: dd8aa4496f860ad139b7fb20e7c4580172c7b53f5d10bf68bec6e351b70c1394
font_01_sfnt_off00005fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD1 19488 bytes
SHA-256: 6ab0bb34bdf9936d74a5069a2fe515894561d4fac5c5667c4e53c9feabf663f7

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