Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e1e9f4baf4cb86…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 14:53:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9fb71a382fd6ec818f671e88d009ff0a SHA-1: 694e386aa842645d9f218575f733b8de244a8397 SHA-256: 62e1e9f4baf4cb86182dd5141fad8f0b3ed6fe972146343e783bd39d837d8f2b
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to a redirector hosted on 'netcdn.online', which is flagged as malicious and impersonates Facebook to lure users. The document body and embedded links suggest a phishing or scam attempt, likely to steal credentials or lead users to further malicious content. No scripts were extracted, but the presence of malicious links and the lure indicate a high likelihood of a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/real-robux-codes-game-hack.
  • 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 https://netcdn.online/app/431946152/real-robux-codes-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/robux-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-lost-world-2021-com_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_off000051c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51C7 24812 bytes
SHA-256: 71fdaff247e9d6fe7d543b87ba982db23e9754e802dc07ee52fdad3c635fe9e5
font_01_sfnt_off00008aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAE 18324 bytes
SHA-256: c4f7742aedc28b29f193bf98a15545964ca2d90d022e69fc2fcba8726d0ec952

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