Malicious PDF — malware analysis report

Static analysis result for SHA-256 5768599605ba35dc…

MALICIOUS

PDF

44.1 KB Created: 2021-06-14 01:52:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 190c345207ab16aa6d7743cd538c1f54 SHA-1: c05bf7c6e642420fc23225547907c273c83562d6 SHA-256: 5768599605ba35dc89f6da75ba0cb8dda7ab1d498cec50ef1bb43b6d7be7abd4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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 http://netcdn.co/app/431946152/roblox-hole-in-the-wall-cheat-game-hack PDF link annotation
    • https://www.stayon.no/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/how-to-hack-roblox-accounts-2021-no-download_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/lag-switch-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/how-to-get-admin-commands-on-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://www.stayon.no/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • https://www.stayon.no/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/roblox-hack-ghost-simulator-2021_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/roblox-dbz-super-saiyan-war-hack_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/how-to-get-any-car-free-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/coin-master-hack-apk-iphone_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_off00004c08.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C08 26260 bytes
SHA-256: d028027d046ae209f86afd7aeaf30dbbbce58f7603af0bf797c8bccfe98fc4e6
font_01_sfnt_off00008979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8979 18480 bytes
SHA-256: 4c68e2511b6f2d59b1986efe73271adc09f1fc25e2dc8c60ecc2b7f5ececc68c

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