Malicious PDF — malware analysis report

Static analysis result for SHA-256 701db7ad5b7fef50…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 03:33:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 14d6562faa447a7fa3da593770987907 SHA-1: 45da98de41818ec27f94eb6b00360494d3fe9470 SHA-256: 701db7ad5b7fef50298fa36ded891892d61f99a4b5b7bdafab22d8858e36fb96
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. No scripts were extracted, but the presence of malicious redirectors and the lure indicate a high likelihood of further malicious activity.

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/431946152/free-robux-games-that-actually-work-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/speed-city-roblox-hack_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-roblox-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-roblox-cards-no-survey-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-free-ios-no-verification_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_off00003107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3107 22216 bytes
SHA-256: 10079fb4aa2bc6837e7245b31e95655e130ac2d324bef0097dc2208c7e01523c
font_01_sfnt_off00006259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6259 19868 bytes
SHA-256: d6d6c21ebfb94ec66429bf50c50e6ebacf9910fb21d66d19805e4ed0a6b06ac7

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