Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6d86ecc493fb37…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 01:21:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7538617741f279bb7488df7bffed653c SHA-1: baf4feb26073fcea48dcd2ab3b0780b68df2f6b5 SHA-256: 2b6d86ecc493fb37fd71e50e9b4b70fefbd9a4166b58f4e3860cebdca8bad114
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/479516143/best-minecraft-hacked-client-game-hack. These links are presented as lures for game hacks and free currency, indicating a social engineering tactic to drive users to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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.tw/app/479516143/best-minecraft-hacked-client-game-hack In PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/how-to-get-50-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/what-is-the-robux-hex-value-in-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/free-roblox-robux-hack-generator-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/does-cheat-engine-work-on-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/roblox-attack-on-titan-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/how-to-get-free-tix-on-roblox-high-school_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/free-live-giveaway-roblox_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/roblox-shirt-template-free-download_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/can-i-get-free-robux_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_off00003237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3237 21828 bytes
SHA-256: 1b2fc7a4b2fbffc4681a5eee0125ee0273427abde9bc306811a483901ba600b3
font_01_sfnt_off000061e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E4 18492 bytes
SHA-256: 86296843b88eed25728c8cc075b43780ca1cc7c9d5e807804b99454961e5616a

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