Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfad629e951e704a…

MALICIOUS

PDF

35.6 KB Created: 2021-07-08 18:54:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: de2c1441e67befff55ce2984069487a3 SHA-1: b185805defd6f734b24cc7a6e128d9f1edea3323 SHA-256: bfad629e951e704af1ed716bde5b5e44aa23f29d1a95d4313c6c5c6e4e99b38b
142 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. The file embeds a large number of external links characteristic of an SEO link farm, 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 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-do-you-get-free-robux-without-doing-anything-game-hack PDF link annotation
    • http://www.raneenmed.com/uploaded_files/userfiles/files/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/hack-robar-cuentas-de-roblox-2021-akakaa_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/how-to-hack-into-peoples-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/roblox-noclip-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/roblox-login-cheats_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/good-watchdogs-hacking-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.raneenmed.com/uploaded_files/userfiles/files/2021-robux-hack_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_off000031db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DB 22316 bytes
SHA-256: ff58e1431c16f96a318325bb2689f889d707dc3b3a5cc5d652ce32b50a3769f3
font_01_sfnt_off00006390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6390 19980 bytes
SHA-256: a10b86a95e1163526836e1939e7e424d9e0b635c08126f71a6a7b060d93e13a9

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