Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2dad6f7ee953693…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 20:05:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8b8e0c6b75253077aef2d425d054ca8b SHA-1: aa2d779d17ec8ef8d932e6395ea1c338404b5119 SHA-256: f2dad6f7ee953693cee5ff47cde99f4bace3b545e3f56a70ee0a82c7397e17a1
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks or generators. The primary link, http://netcdn.co/app/431946152/how-to-speed-hack-with-cheat-engine-on-roblox-game-hack, leads to known malicious redirector infrastructure. The document's structure and content suggest it is part of a phishing or malware distribution campaign, likely using a spearphishing attachment as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-speed-hack-with-cheat-engine-on-roblox-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-jailbreak-best-teleport-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-forgotten-knife-in-assasin-y-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-cheat-engine-money_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-a-free-keycard-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/cheat-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-hair-for-boy-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-builders-club-on-roblox-ios_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/dantdm-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-and-coins-generator_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_off0000313a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313A 22568 bytes
SHA-256: 7636c965285996c6d340cf8048949fe916bc6bac2fb909ae08708bef79849d0a
font_01_sfnt_off00006388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6388 19756 bytes
SHA-256: 3135f1f27c020ec0bfed92b3cbd70fa729cbe15073b21f633a389810fc418637

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