Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa861f527e5e7cd…

MALICIOUS

PDF

34.5 KB Created: 2021-07-07 10:09:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bcd4655ff1c4e2d33c00c0af1743743b SHA-1: dc3123bade2bffdf2a5d5cbb60c90887b107894a SHA-256: 3aa861f527e5e7cdbc5e749ad1c9d86f0de2d8f04cd523045ef25dcfe140bf4b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a lure of 'free hacks' for popular games like Coin Master and Roblox to entice users. It contains multiple embedded URLs, including one pointing to an IP address, which likely lead to malicious sites or further downloads. The ML classifier strongly indicates malicious intent, and the overall structure suggests a phishing or scam attempt.

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.
  • 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.
  • 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 http://netcdn.tw/app/406889139/free-hacks-for-coin-master-game-hack PDF link annotation
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-free-spins-5-10-2021_GM406889139.pdfPDF link annotation
    • http://45.115.65.99/__statics/gudangsoal/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/robux-hack-no-questions_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-kakashi-outfit-roblox_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-robux-please_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/why-wont-cheat-engine-work-on-roblox_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/robux-for-offers_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-free_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/robux-download_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-hack-pick-a-side-roblox_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-spins-coin-master-hack-2021_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_002_off00003159.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3159 22796 bytes
SHA-256: d58712a78640b0be7634fdf2eb0bc361982361e1ffe59e8af0db537d44bbd831
font_01_sfnt_off00006470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6470 18168 bytes
SHA-256: 1e436942c22cf5f1ddb993b5625de9063034e514cb54256dfb31bec93a9ee0e1