Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d17df2d390ead7c…

MALICIOUS

PDF

42.4 KB Created: 2021-05-19 13:54:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 73b5d103f14dff13eef22b807493582e SHA-1: d09c14cd87f18817fd68335219adf7e0adc29af7 SHA-256: 9d17df2d390ead7ca6dd5fa3a4f8854988db41c2693861e727724010f971ed0c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to potentially malicious sites, masquerading as game hacks or free currency generators. The heuristic firings confirm that the PDF links to known malicious redirector infrastructure and is designed as a lure for game-related cheats. While no scripts were extracted, the document body and heuristics indicate a phishing or scam attempt.

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-free-spins-2021-haktuts-game-hack In PDF document text
    • http://tckontrola.hr/files/ww-robux_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/robux-win_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/wurst-mc_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/free-things-on-roblox_GM431946152.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_003_off0000495f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x495F 24732 bytes
SHA-256: ce552b4be9e2827cb2a8c24ee9bec2370d00c0ca00b2fa1846cb43f32c8067b0
font_01_sfnt_off00008250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8250 18600 bytes
SHA-256: 89773803d88a9f64dc5621ed6622458791426392b237d756dbefd16237d4c6e2

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