Malicious PDF — malware analysis report

Static analysis result for SHA-256 10bb1c06e0d03779…

MALICIOUS

PDF

34.7 KB Created: 2021-07-09 22:43:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 890eeaf07c1be74f101ac07218fdb324 SHA-1: 6d55151bd10a33a2917878a413f932d5131f27e7 SHA-256: 10bb1c06e0d03779157803fb4c83d68fd8542c57f57ff882485ecac7b1ff9041
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on promises of free in-game currency or hacks. The primary link, http://netcdn.tw/app/431946152/show-me-how-to-get-free-robux-game-hack, redirects to known malicious infrastructure. The document body and embedded URLs strongly suggest a social engineering tactic to drive traffic to potentially malicious sites, likely for further exploitation or credential harvesting.

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/431946152/show-me-how-to-get-free-robux-game-hack In PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-hack-all-game-gun_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-no-survey-no-password-no-download_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/code-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-does-roblox-know-if-you-are-hacking_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-on-computer-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/robux-tool-free-download_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/wurst-115_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/tiktok-comments-free_GM835599320.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hack-blog_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_off00002f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F57 22700 bytes
SHA-256: 3be82b4f9d5ba78c60e8ac8d1ab828c8b740e31b4638e70b21fac0dc44d3bb09
font_01_sfnt_off000061f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F2 19348 bytes
SHA-256: d26d04a97ef4ef1984db51a9dbb6ae7fe4887511724be7c0a10401d3a20c9a41

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