Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b3d344c58ddca6b…

MALICIOUS

PDF

47.2 KB Created: 2021-06-13 15:27:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b5c41bd3e93bf920a937138eacfad93c SHA-1: 9cb876e21d54bb6012f2cc2fcb37af8e06084140 SHA-256: 7b3d344c58ddca6b32714a5d264801292570077d3baad511f0e48f45157e0826
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • 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: http://netcdn.co/app/431946152/free-robux-no-verification-2021-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
  • 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.co/app/431946152/free-robux-no-verification-2021-game-hack PDF link annotation
    • https://www.omgtours.com/images/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.omgtours.com/images/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • https://www.omgtours.com/images/free-admin-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.omgtours.com/images/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.omgtours.com/images/roblox-phantom-forces-noclip-hack_GM431946152.pdfIn PDF document text
    • https://www.omgtours.com/images/hack-compte-roblox_GM431946152.pdfIn PDF document text
    • https://www.omgtours.com/images/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • https://www.omgtours.com/images/free-draw-roblox_GM431946152.pdfIn PDF document text
    • https://www.omgtours.com/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://www.omgtours.com/images/is-there-a-way-to-get-free-bc-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.omgtours.com/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://www.omgtours.com/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.omgtours.com/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.omgtours.com/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.omgtours.com/images/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://www.omgtours.com/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://www.omgtours.com/images/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • https://www.omgtours.com/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.omgtours.com/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.omgtours.com/images/tiktok-free-no-download_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F2E 26044 bytes
SHA-256: 91ae3eb4151687e999dfd21840df22a31a24ba9ef865bf69a099e78b8bc16506
font_01_sfnt_off000089b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B5 2820 bytes
SHA-256: d88f25cfe237a714f996150a11dd8a058f0f7c3e9d1ae91c17b46c10409b6c0b
font_02_sfnt_off00009350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9350 19004 bytes
SHA-256: d712ae43aec968503a6d4b8ef93db90b07e4d7d9799b66e9787cf09d99ae12e2

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