Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8832855e557e77…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 14:58:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 069156f2c6336f70b5bf67c3347b6e6f SHA-1: 81549f04c1a05934a2328ed86a3f0632600f496c SHA-256: 7a8832855e557e7750d16eed827cc7af6fa098997ac873bd413cc975262e6b86
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them by promising free game hacks and currency. The links lead to redirectors and SEO link farms, indicating a phishing or scam attempt. The document's content and structure strongly suggest it is part of a social engineering campaign to drive traffic to malicious websites.

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/406889139/coin-master-hack-apk-ios-game-hack In PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-continue-as-a-guest-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/pastebin-robux-free-birthday-reward-7_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-monster_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/secret-roblox-free-robux-code_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-free-robux-ads_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/rxgate-cf-free-robux-code_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/get-free-robux-and-bc_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-hack-denis-roblox-acc_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/necklace-roblox-free-shipping_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-speed-hack-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-stuff-on-roblox-xbox-one_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-do-you-hack-minecraft_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_off00003390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3390 22516 bytes
SHA-256: 05741c524c7a5a942e57cefa1927caab3b69737e10a18aa70d82a2651c313655
font_01_sfnt_off000065af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AF 18180 bytes
SHA-256: 669191ced257cad8cf719fd096a029eb32cc90bb1eacba4ce7ed61202962bed4

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