Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e80a31e68373b00…

MALICIOUS

PDF

50.3 KB Created: 2021-06-03 06:01:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6856efcaa072a1a6dd4629f55d78c17b SHA-1: bfb9bfcc3eccbfc7129747512e4f9e1fa86e5925 SHA-256: 3e80a31e68373b00d49457e10b6655affb95262351840cd2e4e07a296e13c9f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external resources, including a primary link identified as a malicious redirector. The document body text and heuristic firings indicate a lure for 'free generators' or 'game hacks', suggesting a social engineering tactic to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to potentially harmful content, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/431946152/how-do-you-get-free-robux-without-doing-anything-game-hack In PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/robux-2021_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/moonactive-coin-master-hack_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_off000054bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54BD 26944 bytes
SHA-256: f9a7300ce1451a11b760f82d3282354a3c8e67df7926aa08971a11e054a09828
font_01_sfnt_off0000927b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x927B 3512 bytes
SHA-256: d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f
font_02_sfnt_off00009e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E0E 19564 bytes
SHA-256: f288fbb1ab92d6f8be6652009a81e99b9e02fb437604b8cefd24a0b2528ef73f

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