Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d38a58e561d444…

MALICIOUS

PDF

48.2 KB Created: 2021-05-10 20:04:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 36b8ce56913c532e6e234cd0fcbe48d4 SHA-1: 1295d905849e646e59befd651e212ea4d11c5ac1 SHA-256: d0d38a58e561d444397b6d554d42648bca9f51f36e4aa77fbaea574875743f74
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically promoting 'free Robux' and game hacks. The document body and embedded links strongly suggest a phishing or scam attempt designed to lure users to malicious websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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-com-real-game-hack In PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-roblox-adopt-me-accounts_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
stream_003_off00004ba8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA8 27464 bytes
SHA-256: 6861be785306e28e25fa838100c38bd9736e35c1e363e9a73ba7caa93e7e4fe4
font_01_sfnt_off00008c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C12 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9924 18576 bytes
SHA-256: a83edd52c2be056a67ce389c2e3103e44ea5f6bc4cdf4c28a35d8553f09f80ba

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