Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ff79c79904948b…

MALICIOUS

PDF

45.9 KB Created: 2021-06-08 12:00:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f6fb41a733be3e1033b813b31d90f96f SHA-1: 9583d028675787f10e065ef5470d664d448e2dd2 SHA-256: e9ff79c79904948b086b9273e5f2e35b989f3d1a2eeba7ac0e21967aa0ead558
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document impersonates Facebook to lure users with promises of free Robux and game cheats, directing them to a malicious URL. The embedded link is identified as a known malicious redirector, and the ML classifier strongly indicates malicious intent. The document's content and heuristics suggest it's designed to lead users to potentially harmful external sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/how-to-use-cheat-engine-6.3-on-roblox-free-robux-game-hack.
  • 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.tw/app/431946152/how-to-use-cheat-engine-6.3-on-roblox-free-robux-game-hack In PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/2021-roblox_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-robux_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/roblox-pics_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/how-to-get-roblox-premium-for-free-2021_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
stream_004_off0000501c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x501C 26764 bytes
SHA-256: 854d8a4ea4f3ae0fe4f6023e68b13565c16e512bf5ae527f5685243d1e7834dd
font_01_sfnt_off00008c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5E 19752 bytes
SHA-256: af788188bc3f680300c89ab5d2b06c1e2aea25143efe082ceef02e56c8df2144

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