Malicious PDF — malware analysis report

Static analysis result for SHA-256 e603a92e873d75cc…

MALICIOUS

PDF

35.4 KB Created: 2021-07-01 13:34:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5b542c3b07a5f5d3ac6141302474c629 SHA-1: 497b737c0c072c1990fad1b32f2637e6e95d84c4 SHA-256: e603a92e873d75cc454d85b04201218a23f2b03f39db9aa6cf32e0c531804f3e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free in-game items for popular games to trick users into clicking malicious links. The primary link, http://netcdn.co/app/431946152/how-to-get-free-item-on-roblox-2021-game-hack, is identified as a malicious redirector, likely leading to further malicious content or phishing pages. The document body and heuristics confirm the intent to redirect users to potentially harmful external resources.

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/how-to-get-free-item-on-roblox-2021-game-hack In PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/roblox-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-robux-does-not-work_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/artmoney-pro-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/do-you-get-banned-for-hacking-in-vip-roblox_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/como-tener-hacks-en-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/picture-roblox_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/minecraft-pe-free-download-ios-no-jailbreak_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
font_00_sfnt_off0000318f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318F 22492 bytes
SHA-256: 668f1c0cf5581e26da37182d3aa40f0c083b30c3ca14b3bc31122b9b1af2f4d3
font_01_sfnt_off000063af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AF 19580 bytes
SHA-256: a81e45050470e873beaf2779856542e2973408a5b2589d10da4e5bca14a1dc13

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