Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbb691793e30120…

MALICIOUS

PDF

44.1 KB Created: 2021-05-11 05:30:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bbdc20a2f2494aa1e9309c256968101d SHA-1: 2f4a7feb385df1b77247e588d7011222935f577b SHA-256: ddbb691793e30120fc062c68442f82c8707d431cdaa0ae8815e625d2fd9a9158
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free game hacks' and currency generators. The primary lure URL is https://netcdn.xyz/app/431946152/how-to-get-20210-robux-for-free-game-hack, which is flagged as a malicious redirector. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/how-to-get-20210-robux-for-free-game-hack In PDF document text
    • https://wald-match.com.tw/upload/files/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-100-spin-slot_GM406889139.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_off00004c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C26 26000 bytes
SHA-256: 2872a60840cbf2e5a282abb5b773e00b252ed4d73d6aee71d5619c942368d7d7
font_01_sfnt_off00008897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8897 18684 bytes
SHA-256: 6e9c0eecafd635f65838c8dbfb1e23e8457e4c9239d4b33e445d621fd980b18f

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