Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ccf3d3e6c25b68…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 06:36:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: dd993c140b7619f4a564b3dd3a46d57f SHA-1: aa5c41709d56c2a04268bc4bf509e3f32edfbda8 SHA-256: a2ccf3d3e6c25b68c052a635b0366947644e9e7fea9b6c9a84d4972c9728e18b
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 currency generators. The primary lure URL is https://netcdn.online/app/406889139/how-to-get-free-spins-on-coin-master-without-waiting-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious websites, likely for credential harvesting or further malware delivery.

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-get-free-spins-on-coin-master-without-waiting-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-in_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-2021_GM406889139.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004eb1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EB1 24860 bytes
SHA-256: 47f751bd1de5cbca5388719b30200e774e3d16f3fb56a1c1c90d3a1142981dff
font_01_sfnt_off000087e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E0 18844 bytes
SHA-256: 74e90038a15acf9d59ef996dfbbccefa77ce85bd889c53575e7537e702976194

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