Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6daa5ab2c27c04c…

MALICIOUS

PDF

35.4 KB Created: 2021-07-01 06:24:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 44d47a642472287f03f1b743804440cc SHA-1: ba2299746c35f6c4c4747bb5b56bf0a67f9e948a SHA-256: d6daa5ab2c27c04cca2fbd585e479b9f294009ac9e7f01b5c5b7f800665327f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free audio loggers' and 'game hacks' for Roblox. The document body and extracted URLs reinforce this lure, aiming to trick users into clicking through to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to download further payloads or engage in phishing.

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-audio-loggers-roblox-game-hack In PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-free-tickets-copypasta_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/1-million-free-robux-landon_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-robux-codes-without-builders-club_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/robux-offers_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/daily-free-spin-coin-master-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
font_00_sfnt_off000033e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E0 22280 bytes
SHA-256: 662a3f97e7ae2763190c07ea33ddbe3f1c5259a6f8481a3b65f8f37cf64f04a4
font_01_sfnt_off00006568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6568 19084 bytes
SHA-256: 924c21d56bae426d4bd1d0d551888ab4af22cb764a9cf6e365206c44fd203519

Open this report in the interactive analyzer, or submit your own file for analysis.