Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab5c02ace29462f…

MALICIOUS

PDF

43.2 KB Created: 2021-05-11 06:00:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6e5ea8e89643afa3886797f3ee7167b0 SHA-1: 9ed9b41aab375640c0844da69566f0415b6ca668 SHA-256: 5ab5c02ace29462f9eda57c43ccdad9617dae5a14ff7687fedbeb0df33080399
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on 'free generator' or 'game hack' lures. These links redirect to known malicious infrastructure, specifically `https://netcdn.xyz/app/431946152/free-robux-no-downloading-apps-game-hack`. The document body and heuristics indicate a phishing or scam attempt, likely to lead users to a site that may attempt further exploitation or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • 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.
  • 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.xyz/app/431946152/free-robux-no-downloading-apps-game-hack In PDF document text
    • http://perpus.i2s-learning.com//repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/what-is-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-hacks-pc_GM479516143.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_off00004c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C21 24180 bytes
SHA-256: 6ae12cf6de080885db8df78e8d102c52287f2dc6bb7e102d585d096b68ff02f3
font_01_sfnt_off00008316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8316 19404 bytes
SHA-256: 49b6dfa9b56ae39db803e39cb2f1ecc2093e69bc279e239e32c5359198169209

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