Malicious PDF — malware analysis report

Static analysis result for SHA-256 718f8be6e310aa97…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 01:52:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 54263bac220c6fa43b399512e86fc646 SHA-1: e227b5e721ed594fcbc1cde28ba6fa0cdb313d55 SHA-256: 718f8be6e310aa97d0e0c81cbb829646c74a6ac4b80b672fb771704a27fd02c1
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to external sites, masquerading as generators or hacks for popular games. The primary link directs to a known malicious redirector, and the document body itself contains a large number of SEO-optimized PDF links, indicating a link farm designed to drive traffic. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a malicious workflow aimed at redirecting users to potentially harmful content.

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/how-do-you-get-free-food-on-coin-master-game-hack In PDF document text
    • http://libsmpn1balongpo.sch.id/repository/how-to-get-free-robux-no-kidding-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-clothes-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/how-to-get-free-robux-on-fortnite_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/robux-app_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-noob-hat-roblox_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/is-minecraft-java-edition-free_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_off00003245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3245 23348 bytes
SHA-256: 038cda7b8b64ac3f148a07604a8236a74102befacc2f5a43b7eaaddf5dfd03ca
font_01_sfnt_off0000671e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671E 18808 bytes
SHA-256: 2d212e7ab6560c4b078d18ad11038a305c0f46ef0a38e18ab0c57beaf18a6128

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