Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a107bea85ff97c…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 19:24:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9d11714a22c9a0dd8731206073caf897 SHA-1: 13f76df86a1571b63f3f96e755f02e1c941d1179 SHA-256: 14a107bea85ff97cc24051ebfb71442f533ccb17f35ae553e33fdbf5d2137d77
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a common lure of game hacks and free currency to entice users to click on external links. The PDF contains a large number of links to other PDF files, suggesting a link farm or SEO manipulation tactic. The primary URL, http://netcdn.tw/app/406889139/free-spins-and-coins-coin-master-game-hack, is likely a redirector to malicious content or a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-spins-and-coins-coin-master-game-hack PDF link annotation
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-and-get-infinite-health_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/promo-code-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/promo-code-hack-2021-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master_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
stream_002_off00002ef6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EF6 23256 bytes
SHA-256: a13613b656b294e84469a3858009fc32d7dfaa83665ffbfb579738c6ddc3bbbf
font_01_sfnt_off00006341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6341 18348 bytes
SHA-256: e3514f5c13c59f74fe131b320bb4a7a21799b0fccf5b53c141d50f68870e844d

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