Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b43963f66b45819…

MALICIOUS

PDF

34.6 KB Created: 2021-07-01 19:35:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3174cb2c6ff956009be66fb25ab034d3 SHA-1: 9cf68f4d267942a4db2c023f01e3686964ef4574 SHA-256: 7b43963f66b458195c0ece82c1f4d7298499488ceca9a84135852a4e10fa3102
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action lure related to free game currency and hacks, specifically mentioning 'Free Robux'. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for JavaScript execution or further redirection to malicious sites, likely as part of a phishing campaign.

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.co/app/431946152/free-robux-no-installing-apps-game-hack In PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-hack-tool-2021_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-cheat-engine-unlimited-cins_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-wall-hack-in-roblox-after-patch_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-hack-asshurt_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-sued_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-how-to-get-everything-free-in-the-catalog_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-generator-no-virus_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/best-hacked-client_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-diamond-generator-roblox-royale-high_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/give-me-free-robux-now_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-no-survey-no-download-2021-ios_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000303d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303D 22252 bytes
SHA-256: 0a8c559f0d3f95986dea92d4346a55d8e8408cdae1c787209951370d87b61837
font_01_sfnt_off000061e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E0 19192 bytes
SHA-256: bf9796ef1a4faca0ff311db0cbd7c3f89f189d7a9c778df8e586f6c1463c9698

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