Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f0cfea2172ac08…

MALICIOUS

PDF

34.6 KB Created: 2021-07-07 11:02:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1007e87339b72e73a2b673a94aac5e16 SHA-1: b2c1ce9e777c2fe78acc840260b2534647f712e6 SHA-256: a0f0cfea2172ac088ad4622374c82ba9ddfde2db95714127b26c0fd13f65bf34
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with 'game hack' or 'free generator' themes. The primary link, http://netcdn.tw/app/406889139/como-hackear-coin-master-gratis-game-hack, is associated with a malicious redirector. The document's content and embedded links suggest an attempt to trick users into downloading or visiting further malicious sites, likely for credential harvesting or malware distribution.

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/como-hackear-coin-master-gratis-game-hack In PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-ninja-legends-free-vip-server-2021_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/get-free-robux-now-2021_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/wild-savanah-roblox-hack_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-arsenal-hack-script_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-glitch-codes_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/get-robux-com_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/cheats-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/krnl-download_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/2021-headphones-roblox-free_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-hack-roblox-using-python_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/hack-para-counter-blox-roblox-offensive-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_off00003213.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3213 22724 bytes
SHA-256: 4d36c23c188dd8a8eb3e57245c1e95dda75d4e768b99bc8df4b6a37c8f16f306
font_01_sfnt_off000064cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CF 18264 bytes
SHA-256: c66f3070175391364df959cc21fdee99d33dee402919222e4eb7164928e73973

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