Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c74a0d7363c986…

MALICIOUS

PDF

34.9 KB Created: 2021-06-30 03:46:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4d9c6e42181c56d44dc76e1f7ef6629f SHA-1: 11d6747685a47b34b4cb0ffa67d5926fda91ab97 SHA-256: 44c74a0d7363c986b46c4dd4fd8d358d3a882b5d4d4a976b37be5ef2a304e743
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.co/app/431946152/free-fast-money-robux-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/roblox-hack-v6-5-mythical-chaos_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/pet-trainer-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-jailbreak-hack-download-client_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-bypass-exploit-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-do-you-get-free-robux-on-pc-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-any-items-free-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-hack-sin-verificacion_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-roblox-for-robux-and-tix_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_off00003118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3118 22424 bytes
SHA-256: 6cb7239a8d7943720b23b2c6806b2a8ae80ea8dffbbc3f0c54fe1314b9e549c4
font_01_sfnt_off000062ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 19196 bytes
SHA-256: 4740a8f1694779d5484f224df5f594176fe9abd35d15c6e54c034e5569d0c124

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