Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1bbe9229fa32e17…

MALICIOUS

PDF

45.0 KB Created: 2021-05-12 22:31:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d156fd374eeee6152c5d6a3b56280cf2 SHA-1: cef9fd4cabca5d7645cd32e53f00c358903751ff SHA-256: d1bbe9229fa32e17570afbcb79ea0dea74d1366fcd8122655aea60b96a747ad1
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 0.9632

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/431946152/john-doe-roblox-hacker-game-hack PDF link annotation
    • http://olesya-chagovets.com/images/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://olesya-chagovets.com/images/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/games-for-robux_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/install-coin-master_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/roblox-gang_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/coin-master-pc-hack_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_003_off00004707.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4707 24664 bytes
SHA-256: 7c3988252b8e80b5acfb8e26b43e6f1b317f25a7c0b6d935f21c8857c84b5cb0
font_01_sfnt_off00007f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F80 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C28 18680 bytes
SHA-256: fd443decf8178cd51ee717e0f89bd27a56480e9e0f5488a79ceaa3e76e017fae

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