Malicious PDF — malware analysis report

Static analysis result for SHA-256 042453bbcc23ba63…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 12:37:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 57b59674cdda6b396ae5e15029bcfb1c SHA-1: 3a53b1fd09836994dff82891054a3d37195f5453 SHA-256: 042453bbcc23ba639374944cca8917ce0cdeb0714251ef4f19f8ae9ea24334e3
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a lure related to game hacks and generators, attempting to trick users into revealing sensitive information such as private keys or backup codes. It contains multiple embedded URLs, including a known malicious redirector, which likely lead to further malicious content or phishing pages. The ML classifier also flagged this document with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://netcdn.online/app/406889139/coin-master-hack-tool-v1-9-game-hack In PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-cards_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_004_off000050e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E2 24188 bytes
SHA-256: bec0ef17604b77a4b7a7299ce2cac5137a41732a393d29f633340957b59dd523
font_01_sfnt_off000087c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C4 18196 bytes
SHA-256: 948bfbd28f908060b86a9c4a078f031a0a7b6f349e372fe1328e9069b1b47d5a

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