Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d94f46fb03c4f5…

MALICIOUS

PDF

35.6 KB Created: 2021-07-01 20:49:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 92efe239cb74f6f3f98284cc12a353c4 SHA-1: df8bf4ec9ff90a74f2c98f1cb9d2d89f7d4cfaf7 SHA-256: 99d94f46fb03c4f58de7afd7850eb3caa541d95b80db2e3541b31d9cb32271fb
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links that redirect to malicious infrastructure, masquerading as game hacks and generators. The document body and heuristics indicate a lure to click these links, likely to download further malware or engage in scams. While no scripts were explicitly extracted, the nature of the links and the PDF structure suggest a potential for embedded JavaScript to facilitate redirection or exploitation.

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.co/app/406889139/coin-master-hacks-for-iphone-game-hack In PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/free-robux-hack-site_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/outfit-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/how-to-make-a-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/daily-free-spin-coin-master-link_GM406889139.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_off000036de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36DE 22276 bytes
SHA-256: a8b7d5b18ea6a8e2d66e050e2f5be48d8b484a9497bb1e7dd7490088e6cddff2
font_01_sfnt_off00006840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6840 18512 bytes
SHA-256: e40d38ca69fbc2360ef6c826f3213b9130efe2c52a4408c914d94055a675c830

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