Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b5d8039ea642f9…

MALICIOUS

PDF

42.6 KB Created: 2021-05-17 05:03:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9c35eee21a5142a9ef17f3c5d773909e SHA-1: 8988e9e7960079b85f4881134bec0cc797181021 SHA-256: 60b5d8039ea642f9a8f75756189f95725721c7c145fb079ca97dccdfb01f1b40
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to websites that claim to offer game hacks and free in-game currency, such as Coin Master spins and Robux. This pattern is consistent with phishing or scam lures designed to drive traffic to potentially malicious or ad-filled sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.xyz/app/406889139/best-site-for-free-coin-master-free-spins-game-hack PDF link annotation
    • http://serviio.org/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/coin-master-today_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://serviio.org/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/robux-gratis_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://serviio.org/images/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B6 26864 bytes
SHA-256: 7c4ddcbba448b5c890c87b0abe57c16064ce45d5a80019e47759a8537de4c5f1
font_01_sfnt_off000084a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A2 18104 bytes
SHA-256: 879ff18a357a82badab2459f221a11f7b700cc3f508e85be5618259a1268201a

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