Malicious PDF — malware analysis report

Static analysis result for SHA-256 a706994b8778307a…

MALICIOUS

PDF

45.2 KB Created: 2021-06-08 21:36:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 75a79260eacce491e962ebd3475bce0e SHA-1: 1e3f0497335fa7349607cb8f3c718bdb1c63bdb2 SHA-256: a706994b8778307a8d6f56f81d87697f413a0c3e7bd04b2e387ae5e281360cd2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9865

Heuristics 4

  • 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 https://netcdn.tw/app/431946152/roblox-hacke-promo-game-hack PDF link annotation
    • https://koeltotaal.com/images/get-free-robux_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/coin-master-villages_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/free-obfuscator-2021-roblox_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/how-to-get-free-robux-no-hack-2021_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/comment-avoir-2021-kills-cheat-sur-knife-ability-test-roblox_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://koeltotaal.com/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/how-to-get-free-shirts-roblox-2021_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.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_off00004ecd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ECD 27524 bytes
SHA-256: b25371dec0d07282a28f66ac419ec8969c4987ae3576ea00338d7f37481bd0e0
font_01_sfnt_off00008d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0B 18596 bytes
SHA-256: d493d79bd3ce5c4e2049be74a6bdd55cee8442e408712e673c10674e1b967fd9

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