Malicious PDF — malware analysis report

Static analysis result for SHA-256 955b6e1546108a55…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 07:10:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: dcbafc34ea394e412a8a6c2f67ca5943 SHA-1: c5b8ffed81d6e7e41be5451118e2aba95fa5978a SHA-256: 955b6e1546108a553408e1ffe722861e03e38c868190c7159bc659d326c9d767
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/free-stuff-on-roblox-game-hack. The document body and embedded URLs suggest a lure for free game items, likely leading to further malicious content or malware downloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-stuff-on-roblox-game-hack In PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/cheat-apocalypse-rising-roblox-25-fvrier-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/trigon-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-dll-hack-download_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-free-hats-and-gear_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-roblox-money-easy_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/tiktok-free-views-trial_GM835599320.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-without-downloads-roblox-november-december-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/serveur-discord-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/easy-hacks-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-powerful-gun-on-nuclear-plant-tycoon-roblox_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
font_00_sfnt_off00002efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFA 22080 bytes
SHA-256: 0b8bd313930b0cf4b75a3a2f457f662200d7881b2c08686b9d9ed65c08ca808a
font_01_sfnt_off00006004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6004 18896 bytes
SHA-256: 37ef9dd38e63a3592f74e34abbbe0b271d35db195f2e1905a39aab1846045430