Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d0fd49da86cfca…

MALICIOUS

PDF

44.3 KB Created: 2021-06-11 04:03:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ed32a2aa5d1dc335126b14386051482c SHA-1: 026e527a58c6b1de21783ca53bb3b8dbdaf88831 SHA-256: d7d0fd49da86cfcaec0de0ceb2e972899502cf700e945f5ddd3be3ab61423b01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically promoting 'robux hack' and 'game hack' lures. The document body, though heavily obfuscated, contains references to these lures and the malicious URL. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/robux-hack-text-verification-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/i-want-to-grow-my-account-tiktok-free_GM835599320.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/wurst-hacked-client_GM479516143.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_004_off00004ee4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE4 25216 bytes
SHA-256: 535a48192720f498c00f836e2f60b819b2ccff262cc79e9c7af050c5bb6add2d
font_01_sfnt_off0000898f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898F 18604 bytes
SHA-256: a7e2d968696e5a2f81c8bc607ab27ee5e36fa8fe51e19ea39dbdf06b2a130248

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