Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b188e77418b016…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 12:12:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: eb41ad2dd555b402bee71a04238afbae SHA-1: ecaec3e9b3e0e92c905b4a92ec2e9b8ca4aeada2 SHA-256: 13b188e77418b0165f490024560602dafdee97e534da9bd4c7631986addd32a4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency generators. The primary link, http://netcdn.tw/app/406889139/hack-coin-master-apk-32-download-game-hack, is identified as a known malicious redirector. This suggests the document is designed to lure users into downloading potentially unwanted or malicious software by exploiting interest in popular games.

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.tw/app/406889139/hack-coin-master-apk-32-download-game-hack In PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-mmc-zombies-project-cheats_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-hack-roblox-with-console_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-roblox-catalog-clothes_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-respawn-rout-66-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-piano-player-hack_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-hack-tool_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_off000032fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32FB 22524 bytes
SHA-256: e2311e638ca3514ff95c27b8516d9b7a1504a6c537f098a43f1e4177088fdd0d
font_01_sfnt_off0000653d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653D 19060 bytes
SHA-256: aaaa7363c14690cb8d82becfd63faebe768a00b2c1620ec6610c0f5109061169

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