Malicious PDF — malware analysis report

Static analysis result for SHA-256 508af0afc5617d0e…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 01:35:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7a040896e3f6c3c08df539a8c0fcdd8f SHA-1: 0e9f9b4d6dbd4bf3cbf2685db09ae28c3efc627d SHA-256: 508af0afc5617d0e26be77bd78ebf61007c11d9803bacb354f2bd44356187e6f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary link, http://netcdn.tw/app/406889139/hackear-coin-master-game-hack, is identified as malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a lure to a malicious site, likely for credential harvesting or further malware delivery.

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/406889139/hackear-coin-master-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-make-everything-free-on-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-noclip-hack-no-download_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-t-shirts-roblox-to-look-like-a-pro_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/comment-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hacks-to-use-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-into-anyones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-project-pokemon-cheats-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-2021-robux-on-roblox-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-roblox-studio-boy-hair_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/all-mobile-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-unicorn-code-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-400-robux-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-jailbreak-hack-free_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-instantly-get-free-robux-in-roblox-oprewards_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hack-de-dragon-ball-rage-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
stream_002_off000030c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30C0 22600 bytes
SHA-256: 224e94ec951916316476417a22a72f910886f6dbfc4e122ff2337030ce77fa08
font_01_sfnt_off00006343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6343 18004 bytes
SHA-256: 3b00d002f064a1bffd211e69e7b7eee4435707ee9e089706d32f556073cfa910

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