Malicious PDF — malware analysis report

Static analysis result for SHA-256 0674a7d83323ed99…

MALICIOUS

PDF

36.0 KB Created: 2021-07-08 00:19:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 56d5b14f639d263169d5b244d51c3ca1 SHA-1: aad71703140eca559d7969f261abe94c0fcd7b3a SHA-256: 0674a7d83323ed992bf6afdb6ccd9f83cc0dc1aec7130af2afa176ced4bf47bb
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.tw/app/406889139/how-to-get-free-coins-in-coin-master-game-game-hack PDF link annotation
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-generator-2021-working-downalod-no-downlaod-oddsfuspanish-translate_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/tiktok-free-open_GM835599320.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-clothes-on-roblox-on-your-phone_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-admin-hack-mega_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-free-stuff-pastebin_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-knife-codes-for-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/getrobux-come_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-coins-and-spins-coin-master-2021_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
font_00_sfnt_off00003513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3513 23488 bytes
SHA-256: a7c30cb93cb155720b558f2127a9a361b1b77d1336c3c2bafc54a76ca281e9a6
font_01_sfnt_off000069f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F9 18420 bytes
SHA-256: 2d9447480b9e6b84fb585e3b568d723d862a2a90c2fba975df7521df3b865f7c

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