Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c02874aee51917…

MALICIOUS

PDF

34.6 KB Created: 2021-06-25 21:57:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 55884912e92d5cb32668df8d0f11c85a SHA-1: 4ac160235027447a44450fc4c403e045d748ac4a SHA-256: c3c02874aee519177931fc4fa500dbf4e975a4f5661af3a1e227987349f70fdc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links that lead to a known malicious redirector infrastructure, specifically designed to lure users with promises of free game currency or hacks. The document body and embedded URLs strongly suggest a phishing or scam attempt, likely to deliver a secondary payload or lead the user to a credential harvesting page. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/claim-free-robux-no-survey-game-hack In PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/banning-hacks-for-khols-admin-house-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-twisted-murderer-free-credits-givaway_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-girl_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-free-money-in-bloxburg_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-daily-1-ga_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
font_00_sfnt_off00002ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFC 22232 bytes
SHA-256: d94201116ae3601f3f8324573a72d46c70fccf86936d629d56840d2c138ea201
font_01_sfnt_off0000613d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613D 19464 bytes
SHA-256: 9c9f6b0d80c5e36cc47860e22d3b0b582abc8f13f316c603ad576df93643f228

Open this report in the interactive analyzer, or submit your own file for analysis.