Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd8212248c7e9dc…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 05:34:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: de6dff095b101fcf00035e7122ca9aa7 SHA-1: abc016af50acfdc4e0f48a1cded42de368011231 SHA-256: edd8212248c7e9dc88eb8d9d8194569212ae04a458f35d6cdd2999b21712267e
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/479516143/is-minecraft-free-on-pc-game-hack PDF link annotation
    • http://razredna-nastava.net/files/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-trading-bot-for-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/hacks-for-roblox-map-kat_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-items-that-hack-your-game_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-hack-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-crossed-out_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-phantom-forces-hack_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_off00003141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3141 22416 bytes
SHA-256: d5cce186f80266e4545815b5924f2e92e5f4717b48266c5b4d962c5061632b6a
font_01_sfnt_off000062eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EB 18008 bytes
SHA-256: 62c66436bb3dd1aa34ea3ada0f014b29f352d4dd73dc7e13f71f1bd631277ac3

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