Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ddb6c3b793454e…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 10:22:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2b18d98b3985af42bdb6bfe31cbfe6f0 SHA-1: f990be57ac9a6d590898789cbb0366516af283bb SHA-256: 15ddb6c3b793454e88536ab372f549124f9f13a88be1510841491bb32beab763
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for free game currency ('Free Robux') to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or exploits. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt, potentially leading to malware download 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.co/app/431946152/free-robux-no-human-verify-game-hack In PDF document text
    • https://alisa.com.tw/upload/files/admin-ofc-roblox-hack_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/to-find-people-ingame-in-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-get-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/can-you-hack-using-developer-console-roblox_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/code-to-redeem-free-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/hspart-imahsimp-yhsbatch1p-pastebin-free-robuxtype-batch1q20212021shq_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-get-free-robux-on-roblox-pc-2021_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-robux-is-gay_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-hack-apk-android-1_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/withdraw-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/blox-land-where-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-roblox-money-2021_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-wikipedia-free-encyclopedia_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_off00002f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F68 22076 bytes
SHA-256: e9e77c6d5ea91f51005de15cc3709aaa452801d6862d86cd1cfd7f42a40c47e1
font_01_sfnt_off00006022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6022 19412 bytes
SHA-256: 54327e069fe8aee8a1f9c86c3e3ab55b96abeaa3698aab69d5a1c80f08638ce8

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