Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31aa005e03c512a…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 02:39:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 815abd42fa49641a86fc139c1b659e44 SHA-1: 0ed6b103fdcf5bfda298886a1010c44e5133a21c SHA-256: f31aa005e03c512a341125697ad6e612c12c362e213d89cf92d75a6d138fd1be
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free generators, directing users to a malicious URL. The presence of a visual download button and the ML classifier's high confidence score indicate a malicious intent to deceive users. The document likely serves as a phishing or scam attempt, leveraging popular game themes to entice clicks on the embedded malicious link.

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/479516143/minecraft-complete-handbook-game-hack In PDF document text
    • http://rlsaluminios.com.pt/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/coin-master-attack-hack-apk_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
stream_003_off00004965.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4965 25036 bytes
SHA-256: 4fad9935cc33ceb0512eff363e5bb76a813eb6317487a40dd19d3374c0fc6230
font_01_sfnt_off0000825b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825B 18724 bytes
SHA-256: 92d200d6f1a6fdb520fe7b7a4fe4beb50248f688d0ff503977d63a4c72546565

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