Malicious PDF — malware analysis report

Static analysis result for SHA-256 82050ba146056a67…

MALICIOUS

PDF

41.3 KB Created: 2021-04-27 06:06:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 03c46d0125342ec2fe517eb14958d09a SHA-1: 5cbb27a98158e402b3013402ec83ffc306d3fe38 SHA-256: 82050ba146056a6702e0e1fb4df3efbcfd9ffa076a0c24b1e00de7471113d8fb
160 Risk Score

Malware Insights

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

The PDF contains multiple links and a call-to-action button, all directing users to a malicious redirector URL. The content explicitly promises a 'Roblox Hack Without Human Verification Or Survey', indicating a social engineering lure to trick users into visiting the malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • 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.
  • 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/roblox-hack-without-human-verification-or-survey-game-hack In PDF document text
    • http://repository.poliven.ac.id/repository/speed-hack-roblox-with-nopde-engine.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/roblox-free-black-shirt.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-reedeem-codes-roblox.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-roblox-accounts-obc-lifetime.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/casper-hack-roblox-jailbreak.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-hack-into-a-roblox-players-login.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-get-free-robux-legit-no-survey-or-scam.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-free-robux-on-gametest-roblox-com.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/despair-roblox-hack.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/hack-de-roblox-mad-city.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_off000040cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40CF 25848 bytes
SHA-256: 1cfce85d4c60b9561aa080bf2bc5a8e81a38bca03fd628e97e6c08d9490437c6
font_01_sfnt_off00007bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEF 19596 bytes
SHA-256: 42a7ad701cfa0fa55de722d62f74f086852253e8b459ccb411a2f21ecc99e63e

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