Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ac70c1c8f2e35b…

MALICIOUS

PDF

41.2 KB Created: 2021-05-16 11:30:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ab6654b368438b215370a6ad4a16a69b SHA-1: 2d279944b95d4b7b26aefb61ad0244a37422cef5 SHA-256: 03ac70c1c8f2e35b49ed7f8157a8e13ac33e0ef407125e7f4791dcc4bf427d4a
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 0.9971

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 https://netcdn.xyz/app/406889139/free-spins-generated-from-coin-master-game-hack PDF link annotation
    • http://gops.pruszczgdanski.pl/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-free-spins-without-verification_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_off000047d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47D2 23960 bytes
SHA-256: deb9b4b27a2a1d9763af29a01082fc99c091cfd0a1279e5cdd472b46b39a0b7a
font_01_sfnt_off00007eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAB 18320 bytes
SHA-256: d827f104b81aaf123e8ff1599fe12972b053c6881734e5a14a739a4b5a769c82

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