Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed3007cb07fca78…

MALICIOUS

PDF

34.9 KB Created: 2021-06-27 05:43:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3f8cc24a8940cd29f2b1d392b7ce7fce SHA-1: d5dffd8b633cf9f807192a1c1bc022d69930543a SHA-256: 1ed3007cb07fca78572a6d6f4bf1c386ce97d2c2348c99636d325c8177c8a7a5
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-robux-hack-roblox-2021-april-may-new-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-roblox-games_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/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-roblox-music-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-roblox-games-and-to-run-fast_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/games-that-give-you-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4F 22084 bytes
SHA-256: db4fc373da45981652f23356dfb8125861959c74a275c2465ea9ee3ecd439f90
font_01_sfnt_off0000601d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 20200 bytes
SHA-256: 29ea865e135ea5c9e147840361a08d50a5e366ec2126d759214897d39e53451a

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