Malicious PDF — malware analysis report

Static analysis result for SHA-256 c614acd668c28246…

MALICIOUS

PDF

33.1 KB Created: 2021-07-10 01:23:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cd50abefe2b980e5a67143a06b04d6a9 SHA-1: 73b45dd5ada958ac0fc2de9ac674ab25985d7115 SHA-256: c614acd668c2824600907aeeffed0f7a3132dbfd290316d7a2ed58f515ef81ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that lead to known malicious redirectors, specifically advertising 'free Robux' or game hacks. The primary lure URL is http://netcdn.tw/app/431946152/microsoft-free-robux-game-hack, which is part of a chain of redirects to other game-related scam PDFs. This indicates a social engineering tactic to trick users into visiting potentially harmful websites.

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.tw/app/431946152/microsoft-free-robux-game-hack In PDF document text
    • http://fishboat.hr/files/are-free-robux-streams-legit_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/pubg-uc-generator-no-verification_GM1330123889.pdfIn PDF document text
    • http://fishboat.hr/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/cheats-and-codes-for-roblox_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/roblox-clone-cheat_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-get-free-robux-in-roblox-zephplayz_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/the-wild-west-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/how-to-noclip-in-roblox-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://www.fishboat.hr/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://www.fishboat.hr/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/how-to-hack-roblox-ios_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-free-spin-codes_GM406889139.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_off00002d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D1F 21432 bytes
SHA-256: 27cd0e1fd6e35f45c0f3ffb6122c5d6ae14645945302fe7ef3fee772a46ac787
font_01_sfnt_off00005c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1C 19136 bytes
SHA-256: eceba35cd6627b8fd8c95b6fc578f752ad37bdbc88f79a1a211c8d87d48b0e2f

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