Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc4e6d88a282908…

MALICIOUS

PDF

32.2 KB Created: 2021-06-26 04:26:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 78127d218b1924285ca049b85b1896d2 SHA-1: 15c8bfb6ed5ddbcc6fe20dfa77d101d6079cc560 SHA-256: dfc4e6d88a282908a4775d31047f5f8d49f2665e29b15e3a8c309331ca485329
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that lead to known malicious redirectors, disguised as generators for game hacks and free currency. The document body explicitly mentions 'How To Use Hacks In Roblox' and includes a call to action to download, reinforcing the lure. Although no scripts were extracted, the embedded URLs and the nature of the lures strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful sites.

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/how-to-use-hacks-in-roblox-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-grab-points_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-hack-atravesar-paredes_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/stole-models-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/html-falso-para-roblox-para-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-robux-apk_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-ticks-and-robux-no-scamn-idiiotr-rwetfr3eytegr-tgre-ee354_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-items-instagram_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-script-roblox-game_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/static-moonactive-net-rewards_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_off00002aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA6 21584 bytes
SHA-256: 8581201376fd3930b081774939585e2ae56f2409515e5f577d93a4dc4249c5dd
font_01_sfnt_off000059c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C1 18820 bytes
SHA-256: 9b33e01fc3841e2c90e3ef4be92efeda0636a94cc8e7bb56b85dfd90078f3247

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