Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd64bc6bddbc5d1…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 16:52:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9742d813cc6c55e6ee483ef1f14b2aca SHA-1: ac35c4b89ccc017db5bd2888c291966aaf59b139 SHA-256: 3dd64bc6bddbc5d149e35c7d3255084fa687c7866f58d53dbabb726a93a059f6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that lead to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for game hacks and currency, designed to trick users into clicking the malicious links. The primary IOC is the redirector URL, which likely serves as a gateway to further malicious content or downloads.

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-generator-no-survey-online-game-hack In PDF document text
    • https://wald-match.com.tw/upload/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-hack-roblox-no-downloads-2021_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/roblox-free-skin_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-15-free-spin-link-of-last-5-days_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_off00002f47.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F47 22256 bytes
SHA-256: 304f57e154ed507c58e266d608ab781e5fb395360b3746373d43a79bbb881325
font_01_sfnt_off000060aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AA 19308 bytes
SHA-256: cd611cf91c17a02eb06b1baf70b4e16d607867479b23f98698283b1602fd2944

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