Malicious PDF — malware analysis report

Static analysis result for SHA-256 48058f2cfdde5e09…

MALICIOUS

PDF

32.5 KB Created: 2021-07-04 06:31:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 08765090977172c1cd54921a34e4051b SHA-1: 39b5f2cef835973b9d2fde3f69559940214eb49b SHA-256: 48058f2cfdde5e0985dc1df0432f9898c1534dbce46bc9b90c52646d4e837bf7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'free game hacks' for Roblox. The document body and embedded URLs suggest a lure to trick users into visiting these sites, likely to download further malware or engage in credential harvesting. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-builders-club-free-game-hack In PDF document text
    • https://resmed.ear.com.tw/image/data/files/how-to-join-builders-club-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/roblox-meep-city-money-cheats_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/roblox-lvl-7-exploit-free_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/robloxhacks_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/robux-claimer_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/do-you-want-free-robux-get-unlimited-robux-for-free_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/roblox-cheat-discord_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/does-free-robux-eu-work_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/pubg-uc-2021-trick_GM1330123889.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A7A 21688 bytes
SHA-256: 309a0cb570d9fcedc072eb0c10c85ca2a2bdcad3bfaf12f1b776f029dc6b5b8f
font_01_sfnt_off00005a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A48 19084 bytes
SHA-256: 9ede01f30692fb7b09932d1c7901b9b1b38205622bcfe306de47e28e48f2dda1

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