Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0a3477261c4e84…

MALICIOUS

PDF

45.8 KB Created: 2021-05-12 04:31:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 630e0de1b33a4a5db09611b95710db54 SHA-1: ccb3770d8cb7ac5c2333ed66d709aa39f301a5d1 SHA-256: cc0a3477261c4e843c3cfd9caae8af200d33406c0a7902d58ac10aef4aa6927b
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to redirector domains, which are known to host malicious content. The document body and embedded links suggest a lure for game-related cheats or generators, a common tactic for distributing malware. The presence of a visual download button further supports the malicious intent of directing users to download potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/coin-master-hack-pro-gamers-game-hack In PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/robux-earner_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C6 27752 bytes
SHA-256: 2d387a2e0b6adc9212f9beb19a49f78ad651f44d78aaf8d59be638bfe7869da4
font_01_sfnt_off00008783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8783 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9135 18132 bytes
SHA-256: 7c3ba000fcc9e82367a9cf09e7428e48624a936725f215f3086fe1b405a0b7f2

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