Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c5b506c43435e3…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 00:47:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e193b6319967a7aeb26d84df93ceaeeb SHA-1: 16213e39cc417ed47f913e927fec7b2533aec13d SHA-256: 68c5b506c43435e326bb150e34df1f6abe3bc52efd656822c5641e02ae54da4e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically http://netcdn.tw/app/835599320/tiktok-free-anime-websites-game-hack. The document body and embedded URLs reinforce this by advertising 'free generators' and 'game hacks', a common lure for phishing or malware delivery. While no scripts were explicitly extracted, the nature of the redirector and the lure suggest an attempt to deliver a second-stage payload or phish for credentials.

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/835599320/tiktok-free-anime-websites-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hacks-for-roblox-on-phone_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-hack-players-on-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-model-butterflies-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-a-free-face-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-dayz-cheat-codes-xbox-one_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/guuddinfo-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-hacker-mask_GM479516143.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
font_00_sfnt_off00002fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCE 21984 bytes
SHA-256: 9b68a2c81381ec08b44cf50ef69af10ee22ce80c34108acd2ff2c77ab55d9714
font_01_sfnt_off00006061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6061 18588 bytes
SHA-256: 6b1739fa2e611dc757ed625466adf3e603dc3939b0c935195c817a0fbff4048a

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