Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd9166d2467760c…

MALICIOUS

PDF

42.6 KB Created: 2021-05-15 09:14:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e99af0a64f82810bd9b4090ee847bcf9 SHA-1: 34753a2a24b2af33ea7337980526c1ecef6c23dc SHA-256: acd9166d2467760c0c51d9fd0cf53e6e8ea869b51d7c202bcd69bad36a53750a
122 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 QR-code 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

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/479516143/is-minecraft-java-free-game-hack PDF link annotation
    • http://118.174.0.244/UserFiles/File/free-100-robux_GM431946152.pdfPDF link annotation
    • http://118.174.0.244/UserFiles/File/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/mathep_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-robux-no-anti-bot-verification_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_off00004c70.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C70 25084 bytes
SHA-256: 173e21051f800df5b35a33f7ff05a80e9431435bd207498311916a5525859627
font_01_sfnt_off0000856a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x856A 17848 bytes
SHA-256: 977a5a3176a426c4d5ca0eba59ff37fbe42280aface958f6b225cf1a5dff4e82

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