Malicious PDF — malware analysis report

Static analysis result for SHA-256 e488cda61e2eb125…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 04:01:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b4919d337e25231194386d9b6626e6de SHA-1: 1dff32b9cfb37c2b21b7b2af6fe5a7f24562b327 SHA-256: e488cda61e2eb125893dd8e63523799aa8e30f20974fb15c0396401685fdf804
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game items and currency to trick users into clicking malicious links. The embedded URL http://netcdn.tw/app/406889139/free-spins-coin-master-links-no-human-verification-game-hack is identified as a malicious redirector, likely leading to further malicious content or malware downloads. The document's structure and embedded URLs suggest it is part of a phishing or scam campaign.

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/406889139/free-spins-coin-master-links-no-human-verification-game-hack In PDF document text
    • https://malungtreks.com/userfiles/files/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-clothing-group-roblox_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-hat-hack-roblox_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-com-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_002_off00003131.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3131 22864 bytes
SHA-256: 05c18691a49ae305108cd3c966dee8cace214b5190cbe32fa5e9298fa3d3aea7
font_01_sfnt_off0000647b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647B 18880 bytes
SHA-256: bae7cc3adddbb08ac14a4132461e215e64c81c27f71b43f07da60d570db63156

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