Malicious PDF — malware analysis report

Static analysis result for SHA-256 443a9117cfd6235f…

MALICIOUS

PDF

42.6 KB Created: 2021-05-17 13:17:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3e120e5e2b5835599d07cc0e8cfdb7d9 SHA-1: 061e3520e2fde88eece10cbf9d9db496374e6ffb SHA-256: 443a9117cfd6235f32086340909f109e23feea182bf7dbb05f2f9dcbbd694b99
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9971

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/479516143/minecraft-free-download-windows-game-hack PDF link annotation
    • http://aspiesretreat.org/images/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://aspiesretreat.org/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/ww-robux_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/coinmaster-spin-ml-link_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
stream_003_off000049fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FA 25536 bytes
SHA-256: 7c69afb48c705fcf21c8521aaa06d8e452b2a30b0727c9c6bd356dc9921074bd
font_01_sfnt_off00008373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8373 18488 bytes
SHA-256: 01dcb0f2ff627f41b1d4924369c472c3c2df1c4c10fc263e12ce9879fd09d82b

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