Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb52200cd2d44a80…

MALICIOUS

PDF

34.8 KB Created: 2021-07-01 03:42:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5e11e2d042e7fa3db105d4a5adcc8426 SHA-1: 02a64381ee9545c4451f97c298e55e0b3a421bf7 SHA-256: eb52200cd2d44a80a1326af918f8ed122259b06e6d7f42023b817fa56e80a8d7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising game hacks and generators. The document body and extracted URLs suggest a lure to trick users into visiting these sites, likely as part of a phishing or scam campaign. No scripts were extracted, but the presence of malicious redirector links and the ML classifier output strongly indicate malicious intent.

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/479516143/how-do-you-hack-minecraft-game-hack In PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hacks-for-roblox-csgo_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-ninja-legends-groups-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-admin-on-any-roblox-game-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-hack-us-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-trolling-outfit-for-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-robux-2021-easy-nov_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/play-free-roblox-war-games_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/robux-hack-generator-no-veriy_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-roblox-hacks-pain-exist_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-natural-disater-hacks_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-roblox-gift-cards-discord_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/cute-free-roblox-outfits_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_off0000333e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x333E 22040 bytes
SHA-256: de5c2e77b38a27dae969da278eed35aad228ec8b0e9b5e17cdd3b1e948b5b2ee
font_01_sfnt_off000063b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B8 18804 bytes
SHA-256: 12a5592d1a5b4d5f1871214198de719998814125497f597bc50e969619909f04

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