Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59adadfdfc7c26d…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 10:45:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7b8b96956fccb243011368be3318a3fe SHA-1: ad78fc2470979630661715aa544dad0d39c4a9ba SHA-256: f59adadfdfc7c26dee4a440a97b9975df59d14225ffda22dfe926ac2e4cd05ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector lure, specifically referencing game hacks and generators. The embedded URL, https://netcdn.online/app/406889139/how-to-hack-golden-card-in-coin-master-game-hack, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to the same URL and game-related terms, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/how-to-hack-golden-card-in-coin-master-game-hack In PDF document text
    • https://library.pqm.co.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-roblox-followers_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/minecraft-xray-hack_GM479516143.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_off00004e9b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E9B 27284 bytes
SHA-256: 3240837cd632f867ecc5c7e102c133d84e1f98c38a26bea0eb77e927cde01629
font_01_sfnt_off00008ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE9 18128 bytes
SHA-256: 6e99c01af804bf31f20ebf44881e4bc5fba6244af653fbf7f93a50858f61393b

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