Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab51136b5c673a9…

MALICIOUS

PDF

41.2 KB Created: 2021-05-19 15:23:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 618771cae490f6c64cd3fcf437117955 SHA-1: c83e139f2be3bdaf10543d7ccfc97dbe9112e989 SHA-256: 6ab51136b5c673a939dff659ce7e8f07f0c399058b24f52cce34dd38018761c9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "free Robux" and "game hacks". The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-net-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

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/431946152/free-robux-net-game-hack In PDF document text
    • http://www.homesweethome.pl/images/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://www.homesweethome.pl/images/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/get-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/mcpe-116_GM479516143.pdfIn PDF document text
    • http://www.homesweethome.pl/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/hack-to-send-gold-cards-on-coin-master_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_off00004723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4723 24408 bytes
SHA-256: dbb7f051234f3193fa2884cd8949c45f05183f0a61d8058525af2fbd6e74096d
font_01_sfnt_off00007f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F19 18120 bytes
SHA-256: 1fd200dee0908774cd7421e0a60456d96d7b5616485fa29449c155c3981f88c9