Malicious PDF — malware analysis report

Static analysis result for SHA-256 16518508fdd4eeb1…

MALICIOUS

PDF

42.6 KB Created: 2021-05-13 03:04:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 85dc81a2e76f4fdf41ce0bff8bbc4d95 SHA-1: 0becb4661f4ba202c6b2246892681f0d6e067f05 SHA-256: 16518508fdd4eeb1591819ce08844efb49539aaa169bcbd5b0346fc2a5d346f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and sites offering game hacks and free currency, indicating a social engineering lure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content or initiate downloads.

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/multiplayer-master-hack-coins-game-hack In PDF document text
    • http://alexanderautos.co/images/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://alexanderautos.co/images/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://alexanderautos.co/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/robux-claimer_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://alexanderautos.co/images/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-heaven-free-spins_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_003_off0000479f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x479F 27440 bytes
SHA-256: 225fd0fc31569735d172b904ed36013c93c36462992e4d4ead5bce1d918dd9f5
font_01_sfnt_off0000841c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x841C 18288 bytes
SHA-256: 8be92bc02ca1dc41f647ca293a0a67ba927c3c923ba3299334502824a8ed5f9e

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