Malicious PDF — malware analysis report

Static analysis result for SHA-256 501b3f91c8cd9c7d…

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 07:09:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a9a75c9bae0feea9af8d83a4a584f794 SHA-1: 0fdafc7fb3389fa8ccd229b499bc455dcf2c51c8 SHA-256: 501b3f91c8cd9c7dfcb836debdd9162783316caf1c2a45ed8726dfd8f0c7b3fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector hosted on 'netcdn.xyz', which is flagged as malicious. The document body and heuristics indicate a lure for 'game hacks' or 'free generators', suggesting a social engineering tactic to trick users into downloading further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/free-spin-and-win-coin-master-game-hack In PDF document text
    • https://www.dachytarasowe.eu/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/get-more-robux_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/get-free-coin-master_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/free-robux-link_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/free-robux-generator-no-survey_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_off00004826.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4826 25364 bytes
SHA-256: b2565edff55e5d2151346d27d3f38f4a81b99a691ef7647e7e615e84aaa9ae80
font_01_sfnt_off000082c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C8 18256 bytes
SHA-256: 9a1b20d80f3e4f809c9a9d9b8851ebdec2d0bde394b804bfd21e1aa58c8059b7

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