Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a9ae0a884582b6…

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 05:56:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 34183bb796725ccaeb6647d241575d76 SHA-1: 130b1555f8cde99b9c8b54be4a1281218ae272fa SHA-256: 56a9ae0a884582b68161fbb2645e19880b6233d7b0a41158589dba62db04e47a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a high-severity heuristic firing for linking to a 'free generator / game hack' redirector, specifically pointing to a URL related to Minecraft. This indicates a social engineering lure designed to trick users into clicking the link. The presence of a visual download button and QR code lure further supports the phishing pretext. The ML classifier also flagged the PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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-java-edition-free-trial-game-hack PDF link annotation
    • https://morishita-tc.com.tw/image/data/files/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-game_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_off000054ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54EF 25636 bytes
SHA-256: a29d1c71577527454237842723bafd8a26a5d8ba6c09b321e97c3d6861005234
font_01_sfnt_off00008f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2D 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000098df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98DF 18240 bytes
SHA-256: 1be29b22a500e2a60a7236cc7f3818504a778037c129f908a3826a58d12b939a

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