Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e41167c843e7578…

MALICIOUS

PDF

38.5 KB Created: 2021-05-10 14:41:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aa04e30aa6b009aa0f4b99c9debc6f68 SHA-1: 79777b780496a9284ed90a381b5abdab51321fde SHA-256: 6e41167c843e75782f54d9a7307c17a3763f6921d88efe05ab4c8088dd25dc32
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9945

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://netcdn.xyz/app/431946152/roblox-free-robux-generator-game-hack PDF link annotation
    • https://gestionpatrimonial.net/images/free-robux-come_GM431946152.pdfIn PDF document text
    • https://gestionpatrimonial.net/images/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://gestionpatrimonial.net/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://gestionpatrimonial.net/images/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://gestionpatrimonial.net/images/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://gestionpatrimonial.net/images/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://gestionpatrimonial.net/images/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://gestionpatrimonial.net/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://gestionpatrimonial.net/images/como-hackear-el-juego-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
font_00_sfnt_off00003a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A6D 25680 bytes
SHA-256: d4d7200fae0b7ce6ce0c44bbf54b3643bda2cd63103b4594b490cfe2afcbe72d
font_01_sfnt_off000073fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73FA 18420 bytes
SHA-256: 9bedda8babb487e8554fc45ae48be92d4657fab6cfffaa18de719644ed37071c

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