Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9abd730eaa67081…

MALICIOUS

PDF

33.3 KB Created: 2021-06-25 20:42:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 35a585ebff3f9e6df11bc66a864b40f0 SHA-1: 0cd68b58ba4060a4b1a00b3263d5156d4625e59f SHA-256: b9abd730eaa67081e18e38b413602a5dc30666260f500e63b0cad6e332a53fdb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that are flagged as malicious redirectors, specifically advertising game hacks and free currency. The document body text reinforces this lure by mentioning 'Robux Gratis Hack Para Android' and includes a call-to-action phrase. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/robux-gratis-hack-para-android-game-hack In PDF document text
    • http://sttlets.education/senayan/repository/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-hack-apocalypse-rising-2021-download_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-how-to-hack-a-person_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/com-hackear-cuentas-de-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/without-human-verification-pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ACB 22292 bytes
SHA-256: 2b3f3f802bef86bc17bf808deb0ab75b18ea18c355442771351ec47a05896f1b
font_01_sfnt_off00005c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C78 19276 bytes
SHA-256: 425cb3631588b103fe9d3b532cc1e7cb503d4b30f2b5691ed9efcdbfa8feeb6c

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