Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86818efb37ce7b0…

MALICIOUS

PDF

35.8 KB Created: 2021-07-01 22:46:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9490dc52ca9e44c8eab23268a4ec3233 SHA-1: 23ff7463fd44a2f270072381eabbe15860f96d1b SHA-256: d86818efb37ce7b0f93a80d775376cc5bd41440d04bb63bf7d333a2be0520f61
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and cheats to trick users into clicking malicious links. The document contains multiple embedded URLs that redirect to potentially harmful content, including other PDFs hosted on suspicious domains. The primary malicious link identified is http://netcdn.co/app/431946152/roblox-2-player-company-tycoon-cheats-game-hack, which is flagged as a malicious redirector. The document body and heuristics indicate a social engineering tactic to drive users to external, malicious resources.

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-2-player-company-tycoon-cheats-game-hack In PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/hacks-para-roblox-2021_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-generator-for-roblx_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-with-proof-2021_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-its-free-id_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/ww-roblox-come_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/what-is-coin-master_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/60-free-spins-coin-master_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_off00003107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3107 23236 bytes
SHA-256: 38471102c3507176ed706e8e032559cd26a42fea04947291552534eb8d3b199b
font_01_sfnt_off00006541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6541 19652 bytes
SHA-256: 9ec63d49be41166ac8645a0ec12f2abdd198bfd5a3021071630e644017f0d170

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