Malicious PDF — malware analysis report

Static analysis result for SHA-256 88197eb1627b45e3…

MALICIOUS

PDF

34.3 KB Created: 2021-06-25 15:41:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e690ff931f5e344dded690d072442ccf SHA-1: 6a0fb5b32cd8d414dbcefb5e4a798e78b182b3e7 SHA-256: 88197eb1627b45e380e28916431ed1ed3a52100229fefdeff078d2c578721370
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a URL promising free in-game currency, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the link. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-get-free-spins-for-coin-master-game-hack PDF link annotation
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-get-free-airpods-tiktok_GM835599320.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-park-forest-free_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-galaxy-arcade-free-ships_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/roblox-cheat-engine-change-price_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-to-get-the-green-dragon-wings-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/guess-the-character-roblox-free-robux-answers_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/minecraft-com-free_GM479516143.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
font_00_sfnt_off0000320e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320E 22268 bytes
SHA-256: 107dc728f4d1400e44741dc0dac516c63ead4bdceb895f07bfdfccafdd6a3977
font_01_sfnt_off00006327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6327 18336 bytes
SHA-256: 23f71a9ba4d854b783c042dde3b810d75211435ebb04f16eb6963276a01a3aa2

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