Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db1378575e87a2a…

MALICIOUS

PDF

34.2 KB Created: 2021-06-25 15:18:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a153cd66272340abe93591c008911ffe SHA-1: aa7ec393a270408ea8c90cf5066f3878627090e2 SHA-256: 8db1378575e87a2a652dc9c845b5428451ec39b2d4e4756e8e14d69a1104adab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, leading to a 'game hack' lure. The document body and embedded URLs suggest a social engineering attempt to trick users into downloading potentially malicious files or visiting further compromised sites. The ML classifier also strongly indicated maliciousness.

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/roblox-mad-city-hack-money-game-hack In PDF document text
    • https://domc.tw/upload/files/robux-download_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://domc.tw/upload/files/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://domc.tw/upload/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/is-tiktok-free-on-apple-store_GM835599320.pdfIn PDF document text
    • https://domc.tw/upload/files/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/hack-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/free-online-roblox-no-download_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/teleport-script-roblox-hack_GM431946152.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_off00002e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E96 22116 bytes
SHA-256: 931079f2881e5adfbb778dc9eef04af08ac983a0285642dc9837f15246df616b
font_01_sfnt_off00005f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4D 19428 bytes
SHA-256: 1ab421a48c6278f893a46072eee3b3b0fb483b273cc3d5b5ee7d410846742bbb

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