Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddecddbb6d52319c…

MALICIOUS

PDF

34.4 KB Created: 2021-07-08 08:22:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: eed3a5d94c3fea9b243626734a7e1799 SHA-1: f13b03a27d402566f385f21cb00b6ae34e921c42 SHA-256: ddecddbb6d52319cbc2eb7b8688e1d26b659993008456102a57ddd69749d7e64
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free accounts. The primary link, http://netcdn.tw/app/406889139/best-way-to-hack-coin-master-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into downloading potentially malicious content.

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/406889139/best-way-to-hack-coin-master-game-hack In PDF document text
    • https://3qblocks.com.tw/image/data/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-money-in-roblox-bloxburg-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/inf-health-script-roblox-hack_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-roblox-accounts-with-no-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/buildtools-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/code-for-the-roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-roblox-gift-ard-codes-valid-codes_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/case-clicker-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/comment-se-faire-hacker-dans-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/fb-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-phantom-forces-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-coin-master-cards-link_GM406889139.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
stream_002_off00002ff0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FF0 22764 bytes
SHA-256: c0376e4c54d3a863dc9076664cc506c67cf7ef7301a08979f4a32997024cfe2b
font_01_sfnt_off000062db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DB 18600 bytes
SHA-256: 795bb7b67d1be391f10a55ce85078e04cbbe49810cfe5cd34154fe0b18fb34e0

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