Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd2bdb450be0508…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 00:48:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 89b8d499d602ed6f22a542b859ad5e85 SHA-1: d5f20c5957747cfd3b54e75a1e42c57f3812d748 SHA-256: ffd2bdb450be050810319b8c6a35071c9638b531a5d1980c8ddda7ab52e64ab6
220 Risk Score

Malware Insights

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

This PDF document employs a lure of free Robux and game hacks to redirect users to malicious websites. The heuristics indicate a link farm and a malicious redirector, suggesting the primary goal is to lead users to potentially harmful content or malware downloads. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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.tw/app/431946152/free-robux-hack-no-human-verification-game-hack In PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-no-scam-or-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/robux-unlimited-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-twitter-codes-for-assasian-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-robux-hack-generator-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-profile_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-scratchy-youtube-how-to-get-free-games_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/pubg-800-uc_GM1330123889.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-hack-roblox-groups_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-free-gift-card-codes-reddit_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/download-flying-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-admin-on-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/what-is-wurst_GM479516143.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_off00003221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3221 21576 bytes
SHA-256: 8463ae90878a339cdfe3dc6c3ab0fbbeddd02a7b989e937ba37f6bc8b3173f63
font_01_sfnt_off00006141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6141 19504 bytes
SHA-256: eb8ce7e3da5a97c3b4f0a1013d81a421e960dbc6320d0a210e145d8bed029be0

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