Malicious PDF — malware analysis report

Static analysis result for SHA-256 192354794a41bf92…

MALICIOUS

PDF

33.9 KB Created: 2021-06-30 01:22:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: afb65540f509599b663dd39e27210ec8 SHA-1: 0cef9d509aa5b6f2e079a4c2023cf67be16b7042 SHA-256: 192354794a41bf92f957973eb04db8f07cb433ef7739da4de3a379daae8eec62
160 Risk Score

Malware Insights

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

The PDF document contains lures for free Robux and game hacks, directing users to a malicious redirector URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or further stages of an attack. No scripts were extracted from this sample, but the document's structure and embedded links strongly suggest a phishing or malware distribution attempt.

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/free-robux-generator-no-download-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-someone-on-roblox-like-anonymous_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/bad-business-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-roblox-accounts-with-builders-club-and-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-2021-not-clickbait_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/bux-gg-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hacks-phantom-forces-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-android_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
font_00_sfnt_off00003047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3047 21104 bytes
SHA-256: 6cacc0ef07d68ee742b60a3b5d3e0689a55c96d9886a4fadc37dbe293b7777d7
font_01_sfnt_off00005e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2B 19400 bytes
SHA-256: 0535d1ea35862a6ff7f3b369559d54a653a8f45bd25fa2875eaf0350c9a23f12

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