Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2a5082a3591410…

MALICIOUS

PDF

41.7 KB Created: 2021-05-11 18:14:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 536e2863e6629de48934b793d48afa47 SHA-1: 0c75190beea9babf4632b650c23db80fa62042a7 SHA-256: 1a2a5082a359141097706b4dd75893383ea354bde4d5bed136d8dc351594c6ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are known malicious redirectors, specifically advertising game hacks and generators. These links lead to further PDFs hosted on domains like 'sttlets.education', which are likely part of a phishing or scam campaign. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links confirms a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-hack-twitter-game-hack In PDF document text
    • http://sttlets.education/senayan//repository/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-many-levels-does-coin-master-have_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_003_off000049f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F9 24584 bytes
SHA-256: 9f32f78d2ab89fab97097bd8d67b831fb26d5afb36827c0fd1a75a8d6bf43b7f
font_01_sfnt_off00008186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8186 17880 bytes
SHA-256: 91c2be8de5132e4c01efff6048559585f8cc3e87dd90bf946d8d6b14de046cac

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