Malicious PDF — malware analysis report

Static analysis result for SHA-256 e200dafd7887bbb9…

MALICIOUS

PDF

42.7 KB Created: 2021-05-14 23:32:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 08e22eaaaa46ccc86615e80e380ac66f SHA-1: 480f4c7be054064b6a48a230f8ccffae26783e93 SHA-256: e200dafd7887bbb99151e3cbdddcd79a14a5517109e9da41465c299ca74abeb1
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 0.9971

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.xyz/app/479516143/can-i-get-minecraft-for-free-game-hack PDF link annotation
    • http://www.learningbydoinglingue.com/images/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/robux-claimer_GM431946152.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://www.learningbydoinglingue.com/images/getrobux-info_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_003_off00004cd1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CD1 25296 bytes
SHA-256: 0fd51bf64e6fa643c2a997e274a8816c81563c9618d82b5a18300e934b9bf1f8
font_01_sfnt_off00008680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8680 17712 bytes
SHA-256: e4c5326dba6bbe04ecfe42fb3576534f1bedf9d9a77461a4c126bff948161748

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