Malicious PDF — malware analysis report

Static analysis result for SHA-256 c302200e34a2b6ee…

MALICIOUS

PDF

36.3 KB Created: 2021-07-05 07:51:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c466e2ef0c2f4fa7e7a5f04e5d1fc278 SHA-1: f4849897c8956e1a1b5427d1f4137236545d63d6 SHA-256: c302200e34a2b6ee3e5b9d54aaba087f2dec3b3dc8460d817edd0905d7f31df7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, disguised as generators for game hacks and free currency. The document body and heuristic firings confirm a lure-based attack pattern designed to trick users into visiting these malicious sites. No scripts were extracted, but the presence of malicious links and the lure suggest the intent is to lead the user to a compromised site that likely hosts further malicious content or exploits.

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/coin-master-hack-trick-2021-game-hack In PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/pokemon-go-free-coins-2021_GM1094591345.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-get-free-robux-without-verifying-anything_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-how-to-hack-an-account_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/robux-free-online_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/cheats-that-make-you-get-staff-on-roblox-on-computer_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/theme-park-tycoon-2-roblox-hack_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/invisibleble-hack-roblox-wearedevs_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-can-i-hack-roblox_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/daily-free-spins_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_off000034a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34A7 23788 bytes
SHA-256: 3897b3934092f9cdc17876d49e6703a237529b04a801e168b8e4253dbe568abf
font_01_sfnt_off00006aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAC 18408 bytes
SHA-256: 7fb6ce414372045c7890abb3479720b8c665cb217e4c9f6526367aadff58daf1

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