Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca1e57ed946e6f7…

MALICIOUS

PDF

41.9 KB Created: 2021-06-14 01:53:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 22848136e67b7122b84f72e7b34371ec SHA-1: 4f092a25e7c947e831ed2b9e841cb239b6a419b9 SHA-256: 5ca1e57ed946e6f7e6b72a7e4da25af661f65fc70b23fb809c68090df24e6b5d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a lure of free Robux and game hacks to entice users into clicking malicious links. The document contains a high density of external links, many pointing to other PDFs, suggesting a link farm designed to redirect users to potentially harmful content or further phishing attempts. The primary redirector URL identified is http://netcdn.co/app/431946152/ads-for-free-robux-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/ads-for-free-robux-game-hack In PDF document text
    • https://imagetravelnepal.com/userfiles/files/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/roblox-free-followers_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/when-your-roblox-girlfriend-cheats-on-you_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-robux-codes-2021_GM431946152.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_off00004a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A1F 24320 bytes
SHA-256: 2f948021ccb9bce78de3261d7d3e1389b9960a750f3d170a437559d34465c6e0
font_01_sfnt_off0000817d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817D 18188 bytes
SHA-256: 8d94796ab2810bce0fe54e1da1cc9f1a7236612fceb7c05253ec0c0529508c1a

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