Malicious PDF — malware analysis report

Static analysis result for SHA-256 44372c7d672dd8fa…

MALICIOUS

PDF

35.5 KB Created: 2021-06-20 02:32:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 04a25b66e80e64e0b27a4d71540828f7 SHA-1: 93faf1ea861cab48babc19d460ae10636c1a7732 SHA-256: 44372c7d672dd8fa0101aaa2489b5f0a16609d8acf212520ea379c49d19c1cd4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and free currency generators. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of known malicious redirectors. The document body and embedded links suggest a lure for users interested in online games like Roblox and Coin Master, aiming to redirect them to 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/how-to-cheat-in-lumber-tycoon-2-roblox-axes-game-hack In PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/hack-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/get-robux-free-no-disabling-adblocker_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/is-nexusus-roblox-hack-safe_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/how-to-get-200-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-free-stone-shirt_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-ninja-assassin-ninjutsu-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/codes-how-to-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_off000031b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B7 22460 bytes
SHA-256: 3e17f8b6fe8009bd9b7c5d41500e3442b1d0982962f3085288f147d9be362d83
font_01_sfnt_off000063d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D7 19624 bytes
SHA-256: 83fcf3576d01ce285edd1f27d314fa5aa18bc682cc0fef615e413832a06d9a35

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