Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ba4b290408dcbb…

MALICIOUS

PDF

35.2 KB Created: 2021-06-20 07:14:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1369901631fcfe7f91a1294acab8f3ae SHA-1: 35e6ba8fe180b8cedf006153d5a78944249bd60d SHA-256: b2ba4b290408dcbb74482f9b667e7a9c09ff27ba65ff482d555aa08d3bd02c2e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and websites offering game hacks and in-game currency. The primary link, http://netcdn.co/app/431946152/how-to-hack-gamemodes-in-roblox-game-hack, is flagged as malicious. The document body and embedded links are designed to lure users into clicking these malicious URLs, likely leading to further malware downloads or phishing attempts. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/how-to-hack-gamemodes-in-roblox-game-hack In PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-hack-cash-in-roblox_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-that-really-works_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-rebirth-codes-for-pet-simulator-2-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-free-master_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/freecoins_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/hack-roblox-portable-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/robux-boost_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-hack-apk-download-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/real-robux-generator_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_off00003256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3256 22448 bytes
SHA-256: ff1f758a2784be3f029b5d42b06a2777ec40b4db4ef455abbc6ee75e8167337e
font_01_sfnt_off000063d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 19252 bytes
SHA-256: 9170fbed0409142fda421a379410142ca26aef79399878497c4a3098ff7a2f61

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