Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd75a02fcb1e5c1e…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 09:58:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: eabcda1a75027386c8dbe12eb84007fd SHA-1: 006e697c0d1c05708056833bf8daeb25b535482e SHA-256: cd75a02fcb1e5c1e5110d83232a5119b832646a436e2fbe635357c3d61a976a0
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks or free generators. The primary link leads to a known malicious redirector infrastructure, and the document body itself is heavily obfuscated, suggesting an attempt to conceal its malicious intent. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.online/app/406889139/coin-blogspot-game-hack In PDF document text
    • https://ibelive.com.tw/image/data/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coinmaster_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/avatar-the-last-airbender-roblox_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_004_off00004dbb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DBB 29216 bytes
SHA-256: 41b5723a436e3c3c3342ed9a10d4a625a79964b51fd4d09786b59f1090c0a3d7
font_01_sfnt_off00008f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2A 18072 bytes
SHA-256: b6b57aabf28892bff8d47b2ee948f48531a19b452856f7a7ef30095015ce7f2d

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