Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c29cb66f88d00b5…

MALICIOUS

PDF

32.9 KB Created: 2021-07-05 04:33:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 68af35f8ab6cea7965a2308c0ba96e1f SHA-1: 254411d27a9f9d11e3b0f774ab824454ec282fb5 SHA-256: 1c29cb66f88d00b5a85adc1def99d7d5f815e3c2604c3e7839e96e0da24aacfb
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 0.9824

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/406889139/daily-free-spins-coin-master-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/consle-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-robux-hack-no-survey-no-password-no-download_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/tiktok-free-folowers-75_GM835599320.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-hack-kohls-admni-house-script_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
stream_001_off00002a5a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A5A 22784 bytes
SHA-256: d781f857b0c0cef0626078245f5d13cb8b7d8f64fa22adb70b0e236982f66b55
font_01_sfnt_off00005d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6C 18596 bytes
SHA-256: e1561e5ad11d6fa371b43628261e275aedbbfff84e2cc2a1b863fefe4a2dbfc2

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