Malicious PDF — malware analysis report

Static analysis result for SHA-256 572cb774d5ed379e…

MALICIOUS

PDF

33.7 KB Created: 2021-07-06 18:21:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 35697d4e11f06631401b3321427fd784 SHA-1: 99df444c1b3bc78f07a8451ac08b4e4cd86ac768 SHA-256: 572cb774d5ed379e101bde1d4e31374e0850bdccd1bfc4753451ab7de194ddab
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 0.9824

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/431946152/robux-without-verification-game-hack PDF link annotation
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/roblox-generator-robux-free_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/controls-for-free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/roblox-cheat-engine-cheat-table_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/roblox-vehicle-simulator-cheat-codes_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-free-cards-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_off00002d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D45 22076 bytes
SHA-256: 75b5777381cb5d73d88ff93857116023965cd57243c5fe70677dcf8ba41eb6dc
font_01_sfnt_off00005e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E29 19276 bytes
SHA-256: 4a2d2f668e89c70dfb6e16bd6998a43472677e1b3c1a09af93738297e9a51636

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