Malicious PDF — malware analysis report

Static analysis result for SHA-256 8488d193af39b0b4…

MALICIOUS

PDF

48.9 KB Created: 2021-05-19 17:20:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0364e5d5b0ffdd2049c28655991fe967 SHA-1: ff75d5c398f6fd16158771a8ee3bb148ec4049a2 SHA-256: 8488d193af39b0b4245d773400a61b34004df22a6ddb3006971d50afaad3a6f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency, directing users to a malicious redirector URL. The redirector, in turn, serves further malicious PDF documents, indicating a multi-stage download and redirection scheme. The ML classifier also flagged this document as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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 https://netcdn.xyz/app/431946152/robux-win-game-hack In PDF document text
    • http://leagueforwomenrights.gr/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/without-pokemon-go-free-account-2021_GM1094591345.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • https://www.micIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b29.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B29 30344 bytes
SHA-256: bb81f4cb6e7161d51bc147627c9e46e877d8e58752ed768ea51adbc661faa793
font_01_sfnt_off0000908f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x908F 3656 bytes
SHA-256: 63a179d8a9645bea05c6d53b1776faf4e4a7281930de6cf484e639846bec2e20
font_02_sfnt_off00009d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D48 18168 bytes
SHA-256: 15163bf3df79450fa72a4743c320c92040a4a8fbd9e827329353468e68532dfc

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