Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cfef27fc6aacbce…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 08:26:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 819653d4b8b6177f1c66ddcf1130e6d3 SHA-1: 827c79872935980216b7eba679a945f27c437b65 SHA-256: 3cfef27fc6aacbceab873da6ce1a4722ffc9be22bdde348d879fade5a418a51d
82 Risk Score

Malware Insights

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

This PDF document uses a lure related to game hacks and free generators to entice users to click on external links. The primary link, 'https://netcdn.online/app/479516143/minecraft-skins-download-free-game-hack', suggests a malicious redirector or download site. The presence of multiple similar URLs further supports a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/minecraft-skins-download-free-game-hack PDF link annotation
    • https://dentmate.com.tw/image/data/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/blox-land-free-robux_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_004_off000051c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C2 25060 bytes
SHA-256: ca2bdb8ee756436e984ccacb1c836621dc822c0195ede5700fd89d1c6b39dc41
font_01_sfnt_off00008a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A60 18460 bytes
SHA-256: 54d3aeb7b3beebea3cfa48561b043312cf5d8c01a954df644a6f0691dd3f9e10

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