Malicious PDF — malware analysis report

Static analysis result for SHA-256 59990932527e9486…

MALICIOUS

PDF

42.4 KB Created: 2021-05-16 18:09:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 472f7e4940c63cd45273d331dbd859fd SHA-1: 165632e3acc6cbe3af2a37229b279316cf5204fc SHA-256: 59990932527e9486b02db304fc6af97d188e61892def660ffeb9280bc348e788
182 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure and a seed-phrase/secret-recovery 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 6

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-coin-master-links-blogspot-game-hack PDF link annotation
    • http://ordineingsa.it/images/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/free-robux-games-that-actually-work_GM431946152.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_off0000497a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497A 24968 bytes
SHA-256: 3d0f172b94149dacf5726bdfe49818fe72059fb53b993935f2db1734ab7038e2
font_01_sfnt_off00008235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8235 18632 bytes
SHA-256: e19cb03e4db5dc0ff2825ab1b6cd29120edbbac4e5fd870bab1836bcb421f615

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