Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ef178ea8505ac9…

MALICIOUS

PDF

46.7 KB Created: 2021-06-04 00:14:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b58280d9b793a18d10b0bf44310a5c1f SHA-1: e0b3dfc6aabf7200be8447493096e665ee53a644 SHA-256: e9ef178ea8505ac930b1643a7e3f588364a05052693694a2b44523b93ed60054
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites that promise free in-game currency or hacks, a common lure for phishing and scam operations. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of many external URLs strongly indicate a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the document's structure and embedded links suggest it functions as a link farm designed to attract users searching for game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://netcdn.online/app/431946152/free-robux-scams-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F59 25324 bytes
SHA-256: 2a3aaa99bfb8130041962a4d558f5cbc2d0a44b5c5de098067592447972869dd
font_01_sfnt_off0000898c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898C 2844 bytes
SHA-256: 0b020d44d68ef4680adc1a010952b014984ad7d4b9ed9f851efb57a64041e860
font_02_sfnt_off00009333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9333 18500 bytes
SHA-256: f6eebadb3de4af7ab0205057cc55fc1daf9397692da1370c2a19d2d749ad11f1

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