Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c272ae1e6fdb39…

MALICIOUS

PDF

45.2 KB Created: 2021-06-11 13:05:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 63f6535c273897e3bc90f38b0e1d45e1 SHA-1: 3ae3e969269309bdd1c912b41d86bea805451076 SHA-256: e7c272ae1e6fdb39ee910a4eb668ced4e98bb3ee03a53bbd91eb9f0b024fdd3a
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 0.9865

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 https://netcdn.tw/app/431946152/how-to-use-hacks-in-roblox-game-hack PDF link annotation
    • http://digilib-unirow.ac.id/repository/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/why-is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-free-robux-on-your-phone_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/make-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-robux-hack-no-download-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack-pro-gamers-com_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_004_off000052f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F6 25640 bytes
SHA-256: 6f740fce33687ed09fdc31d397fbcc5025568fcfcb059a5513481e8c5f364dff
font_01_sfnt_off00008d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1F 18532 bytes
SHA-256: b28180b173b4af095df9f03ec055327a241488695cb74727efaad4adb61fdcf4

Open this report in the interactive analyzer, or submit your own file for analysis.