Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0dc8eee42bd636b…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 09:50:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 52646889846f3e2f1c65e86cc57f76ff SHA-1: b7ab5e3df81ca18543ee37cecced7a5a6c10adb0 SHA-256: c0dc8eee42bd636b2568fefccd67068da64b9947211e1cfa772e814cb1d82c8b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users. It contains multiple links to known malicious redirectors and other PDFs hosted on suspicious domains, indicating a chain of malicious content delivery. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection and lure tactics.

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/blogspot-coin-master-free-spins-game-hack In PDF document text
    • http://razredna-nastava.net/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-how-to-change-your-name-for-free-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/fe-dll-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/hack-version-of-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/pubg-uc-meaning_GM1330123889.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-hack-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-ultimate-gamer-365-new_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-free-executor_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-can-you-hack-into-someomes-account-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-15-free-spin-link-today_GM406889139.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_off00003176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3176 23256 bytes
SHA-256: 7c9b09a00362548b10282551c02ef2ec99eeedbb1d518ea1414d21c8981f190f
font_01_sfnt_off00006609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6609 18464 bytes
SHA-256: d4f4a4328566268ab963e7ab93eb9b97adb01760eea7805a91b582d18af7b90a

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