Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed58d115592168d…

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 18:06:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9ca276846baaf63a2a4bb80861532327 SHA-1: 1341f0d597980c64ce090ad3318ecba3802c514d SHA-256: 9ed58d115592168db4990638d58a7126eb59ff837260e553eaede59cf7b7ebdc
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to malicious redirectors, specifically promoting 'free generators' and 'game hacks' for popular games. The primary lure appears to be related to Coin Master, directing users to a URL that likely serves as a gateway to further malicious content or downloads. The ML classifier also strongly indicated maliciousness.

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/coin-master-free-spins-and-coins-2021-game-hack In PDF document text
    • https://7gking.tw/upload/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-system_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-without-human-verification-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
stream_003_off00004748.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4748 27496 bytes
SHA-256: 3adfcd9b40cce6f26c57f19d60d102b39c7334d4f6605ba47dfd4ebcd1c05658
font_01_sfnt_off00008406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8406 18460 bytes
SHA-256: c259e1f543e24e5bfe6ce8cf601a342cc00786119f62dbfadbed712250492c46

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