Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0148e66bd752010…

MALICIOUS

PDF

34.0 KB Created: 2021-07-01 06:22:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ef0e11b120c2e062627088fc63d72754 SHA-1: bdb42260b9385de378d5c76daf40dc716891486f SHA-256: c0148e66bd7520102175f7553d056dd1d01cd979f79d7dcc601282bb8a1c2232
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is http://netcdn.co/app/406889139/master-coin-hack-game-hack, which is flagged as a malicious redirector. The document body and embedded links suggest a social engineering tactic to trick users into visiting these sites, likely to deliver further malware or engage in scams.

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.co/app/406889139/master-coin-hack-game-hack In PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/spin-and-coin_GM406889139.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/robuxfree-con_GM431946152.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/freerobux-co_GM431946152.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://pfpro.de/ckfinder/userfiles/files/roblox-free-hair-codes_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
font_00_sfnt_off00002f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F75 22908 bytes
SHA-256: 699564bbf7753f0ea148ce114cb5b840827ed008b2faa8ed1fa4d5160aae47e9
font_01_sfnt_off000062e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E5 18004 bytes
SHA-256: beadfd3ddd3986add47ad1d45fcc8fbffc87e77367a39c8aeb12842db4702c34

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