Malicious PDF — malware analysis report

Static analysis result for SHA-256 d817fe1d775d5b5b…

MALICIOUS

PDF

42.8 KB Created: 2021-05-10 16:38:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 232de161515c9eeab20eb222be79d7f0 SHA-1: 99b37873c05475472c831dda266ba9ff50ac6736 SHA-256: d817fe1d775d5b5bc3d3f327a45db7e462bad118f0a49e282a176b3035916273
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency for games like Coin Master. The primary lure appears to be a 'free generator / game hack' for Coin Master, directing users to the URL https://netcdn.xyz/app/406889139/coin-master-blogspot-game-hack. The presence of numerous similar links suggests a campaign to drive traffic to potentially malicious sites or downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-blogspot-game-hack In PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/hack-coin-master-ios_GM406889139.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_003_off000049b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B0 25416 bytes
SHA-256: 46ec184c4f73a1f6be9d25c20607d7e535dcfffbd9ad3e07e4fab2651ce70280
font_01_sfnt_off000084a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A7 18300 bytes
SHA-256: 856755575c1a7459373c524fcaf021c967fba3d5c4d4b4c6d782a1862ea9e167

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