Malicious PDF — malware analysis report

Static analysis result for SHA-256 642e4aab8aa23a25…

MALICIOUS

PDF

48.6 KB Created: 2021-06-03 08:51:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9cfcb5014bdb6f532255fe209144e53b SHA-1: 8e75d427bf21fd1c4c5496d68e290a8dbae2e1cb SHA-256: 642e4aab8aa23a2592b6f48cfccbc2699cdf2eb19355daf2ad5fbc5d4444d5a0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for game hacks and free spins, directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the PDF's structure and embedded URLs align with social engineering tactics to trick users into visiting potentially harmful sites. No scripts were extracted, but the primary attack vector appears to be a redirect to a malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/406889139/free-spins-and-coins-coin-master-link-2021-game-hack PDF link annotation
    • http://dev.pmrscambodia.org/images/uploadfiles/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/ispoofer-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f3b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F3B 29428 bytes
SHA-256: 304199468503e8c27a3bece0108db150af80f7dae3f3770e9dfb6a4e87a1d8b0
font_01_sfnt_off0000908e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x908E 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off00009a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A2F 18632 bytes
SHA-256: 21453a49cd95b47374badb5f9754a763ab250e679095952556df99ea2beff8a3

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