Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4458c9f5e39ea5…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 04:02:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8bcde28b7a7b4e7557d463f7f485385b SHA-1: e38179965cf6ffe3b78ce059b82234b2f1c7980f SHA-256: 7d4458c9f5e39ea5e54e75056d989395aa5d31d73f1fa632e746f7678575208b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The embedded URLs and the document body's text strongly suggest a phishing or scam attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/coin-master-15-free-spin-link-of-last-5-days-game-hack In PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-download-coin-master_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/robux-get-com_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-spins-coins-coin-master_GM406889139.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_004_off000055e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55E0 25760 bytes
SHA-256: 693677ca52134cf0d5489b423e05658d6bf321ec35556460746b2fb949c68942
font_01_sfnt_off0000905e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x905E 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00009b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B87 18644 bytes
SHA-256: 4144dbe1534d0325d37e4c6129895ddb34a2bc26123e242025982d4ceef1bd2b