Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a5424003fbae69…

MALICIOUS

PDF

35.5 KB Created: 2021-06-27 04:37:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6114f364309546af1eb724319f870dbe SHA-1: d8b5077f806ee1fe319ba60f793c3befb5a8910e SHA-256: 10a5424003fbae69e34546d021adae456b8456614c95f23d17b89a2ab8ea0b3c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. It contains a high density of links pointing to redirectors and SEO-optimized PDF files, indicating a link farm designed to drive traffic to potentially malicious sites. The primary malicious URL identified is http://netcdn.co/app/431946152/code-for-naruto-roblox-free-spins-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/code-for-naruto-roblox-free-spins-game-hack In PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-dayz-cheats_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-booga-booga-hack-intalieren-deutsch_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-download-android-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-commands-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-robux-hack-no-password_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-real-easy_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-xbox-avatar-clothes-free-on-roblox-pc_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-free-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coding-script-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-no-hack-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/new-roblox-free-faces_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-by-doing-tasks_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/all-players-in-robloxs-passwords-password-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-game-download-ios_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_off000032e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E5 22276 bytes
SHA-256: 9b7dce20cda3a5bf78a371eb1f2dca8711010405120ada78b18c67ba720acb3f
font_01_sfnt_off000064a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A3 19364 bytes
SHA-256: 86996eab838a8ab4fb7684f5d5ac26778bdd1e01fa3bff1dbf9261dcd6706bbe

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