Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a44782ea51155f6…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 21:20:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 57839aebfff91527e72f6ff1c9386a72 SHA-1: 11e78656e7c91ab24b9148a71f95eed6521eefa4 SHA-256: 2a44782ea51155f65a960c556e428017a78dff551259279b1d90c3827a8d059a
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 0.9980

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 http://netcdn.tw/app/431946152/free-robux-roblox-promo-codes-game-hack PDF link annotation
    • https://maths-pdf.fr/ckfinder/userfiles/files/how-to-get-free-robux-no-inspect-no-pastebin_GM431946152.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/free-10-dollar-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/free-roblox-gift-card-codes-2021-giveaway_GM431946152.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/free-roblox-gift-card-code-generator-2021_GM431946152.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/halo-roblox-royal-high-hack_GM431946152.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/diamond-hack-roblox_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
font_00_sfnt_off00002d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7D 22340 bytes
SHA-256: bce5479a6ef4f19b19a8a73f6cb2e4a6f56b8f26760fe4dc4172c49970119eb4
font_01_sfnt_off00005f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F42 19380 bytes
SHA-256: a452d0c191873ed4d1cd88fa82656ca938fba3e74f496bef56901f9d10460b65