Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe3e6df1b024d67…

MALICIOUS

PDF

35.2 KB Created: 2021-07-08 00:34:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ebcdc3d9c8720262405e814e70dde47f SHA-1: fe97a7ca00e20d1bebeb1176fade7cd4685b2e67 SHA-256: 9fe3e6df1b024d6797700c0b84d02af765717e26968a2a77ac0db9a04023b926
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and currency to trick users into clicking malicious links. It contains numerous links to redirectors and SEO link farms, including the primary malicious URL http://netcdn.tw/app/431946152/roblox-games-to-play-for-free-game-hack. The document body and heuristics indicate a social engineering tactic to drive traffic to potentially malicious sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-games-to-play-for-free-game-hack In PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/www-coinmaster_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/robux-withdraw_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-on-roblox-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/can-you-use-cheat-engine-on-roblox-2021_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_off000030e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E6 22732 bytes
SHA-256: ae467aac39062d4fc8bce86501fa432994222a1c87ad6d7d5a234d2d33245938
font_01_sfnt_off00006439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6439 19244 bytes
SHA-256: a82be5b5343ca8d3a33473f1eeb2fa03f79ce6a168b6328d177a0c05b35390bb

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