Malicious PDF — malware analysis report

Static analysis result for SHA-256 078d20829816fe92…

MALICIOUS

PDF

49.9 KB Created: 2021-06-03 07:43:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 23b75577e73fc0a5e5afd7f90d237622 SHA-1: 7f4b9c1af6482c20d7b6fbf4c9fef4ef123e24b4 SHA-256: 078d20829816fe922c1855d1e0743752035529d52b2b2bfe2a93851fdd7bd4ef
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The document body and heuristics indicate a fake CAPTCHA or human verification prompt is used to trick users into clicking these links. The embedded URLs likely lead to the download and execution of a second-stage payload, potentially exploiting client vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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
  • 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.online/app/431946152/get-free-robux-without-doing-anything-game-hack In PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-tiktok-followers-trial_GM835599320.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/robux-scam_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-cp_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53CE 27004 bytes
SHA-256: d49518fa94ed2f5638ecc253292df73eea3ddadb2238acdc16130a1d9f21b202
font_01_sfnt_off00009078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9078 3992 bytes
SHA-256: ca9cd4f0345d8483bda3e807ea4e40142b8bf70d3672af2d6a5dd7953d1a2391
font_02_sfnt_off00009d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9F 19240 bytes
SHA-256: a9e3aa10522a438dd9eef37bb3e7f322f16e38379d063b4a50e22a05dda2bc13

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