Malicious PDF — malware analysis report

Static analysis result for SHA-256 006274eb383dc114…

MALICIOUS

PDF

44.9 KB Created: 2021-06-08 17:33:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 93611185f00298832dd27859c03d997d SHA-1: a9e6b37292c73956af16d40d0ddb774f00011c8c SHA-256: 006274eb383dc114cd53d64698d75046876b9c05ee5786e2aa30f5b0692e396e
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/como-hackear-roblox-pokemon-go-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-robux-in-roblox-for-free-on-pc_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/can-you-get-free-pokeballs-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/pokemon-go-free-yanma_GM1094591345.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-cheat-in-roblox_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
stream_004_off0000513a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x513A 25288 bytes
SHA-256: c9701f675404de8dd6dcb5b3365345565077e4b6582b6924b991db8e7e28dbdb
font_01_sfnt_off00008c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0C 18596 bytes
SHA-256: 60222f3ad3b71efec5539b8a797e04c1550c833c8dc38f8c1298cd7bdbe5c70f

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