Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c3f719961d972a7…

MALICIOUS

PDF

34.6 KB Created: 2021-06-28 00:03:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6d1dec52d94c23205f1c2def5412e288 SHA-1: eec0751c473339820305bdd965db3ad171b8765c SHA-256: 8c3f719961d972a769ab3e23bef183e59f695dac538057d8028cddcc65d74cc5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency for games like Roblox. The heuristic firings confirm these links lead to known malicious redirectors and are designed as a lure. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites.

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/roblox-blox-piece-script-hack-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/online-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-redeem-code-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/real-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-se_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/clover-online-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-btools-hack-2021-october_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/if-everything-on-roblox-was-free-part-2_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-do-you-get-robux-for-free-on-phone_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-para-todos-los-juegos-de-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-that-you-can-play-for-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-bobux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-for-kids-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-free-robux-no-fike_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-24-7-minecraft-server_GM479516143.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_off00002ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED7 22740 bytes
SHA-256: a0860844b5029973a3b520b03501a94b8928066c8f212706bae011b429c0d53f
font_01_sfnt_off000061d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D1 19212 bytes
SHA-256: ca742b2a77b97652f711c3651bb4a210f2aafd27e2888edb385dfc435057741d

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