Malicious PDF — malware analysis report

Static analysis result for SHA-256 73baf6fe7f0c8f4f…

MALICIOUS

PDF

40.9 KB Created: 2021-05-19 17:32:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a87fead66296486d0b9b4544be04c64f SHA-1: 36b01a9137be4b0c8f3de5135348cebca460c79c SHA-256: 73baf6fe7f0c8f4f991ceb434e036f36c7ad8e587de063b9e2221f6ade72745e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free in-game currency and hacks to trick users into clicking malicious links. The primary URL, https://netcdn.xyz/app/835599320/tiktok-free-view-iphone-apps-game-hack, is identified as a malicious redirector, indicating the document's intent is to lead users to potentially harmful websites. The presence of multiple similar URLs further supports this malicious redirection scheme.

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/835599320/tiktok-free-view-iphone-apps-game-hack In PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-official-website_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/rbx-com_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/pig-master-free-coins-and-spins_GM406889139.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_off00004755.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4755 24048 bytes
SHA-256: 6b051019c4d634fb35457291fcf9d408f00f71572bbe4dfdf0e1071080b764ed
font_01_sfnt_off00007e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0E 18096 bytes
SHA-256: 7870db8a11fda59906e73879cca4bad546bd7f85d04bf6f1576cb7788086bcdb

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