Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e73ed66fb6b7853…

MALICIOUS

PDF

44.3 KB Created: 2021-05-17 08:31:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 722520a3da7bdc46be29fe192b426648 SHA-1: debc5d45bc29d59b6fd3ad3513027527293e36b6 SHA-256: 9e73ed66fb6b7853ed01cdfa1c88871fb1671d4421bbd7fd0bd1e5a48b2b7ef0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to websites offering 'free Robux' or game hacks, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URIs reinforces the malicious intent. No scripts were extracted, but the document's structure and linked content suggest it is part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/codes-how-to-get-free-robux-game-hack PDF link annotation
    • http://xn--regg-blumen-thb.ch/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/mcpe_GM479516143.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/minecraft-hacked-client-download_GM479516143.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_off00004a56.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A56 29504 bytes
SHA-256: 9457fd72fb83eca27c411335172f90efbefc9060e64e199ce5dfaf88d52ef14f
font_01_sfnt_off00008a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A31 18456 bytes
SHA-256: e7ed60d24a78ba6057de20e743a58d73d760a91b60c41324c250f3bd6f119d62

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