Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbec82a563943235…

MALICIOUS

PDF

35.4 KB Created: 2021-06-19 14:10:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 98bd05023cafce29571dd533441552f8 SHA-1: 45f596c8dc87380fac96eb9ed51e9c2c721c312f SHA-256: dbec82a563943235384aaea9bfca4740a85dc4bd73675f24f69dd27fc4f6bf11
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into downloading potentially unwanted or malicious software, such as game hacks and free item generators. The document redirects users to known malicious infrastructure and a large link farm, indicating a phishing or scamming attempt. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a social engineering attack.

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/roblox-apk-free-download-pc-game-hack In PDF document text
    • http://pustaka.bbppketindan.info/repository/free-stuff-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-download_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/pokemon-go-free-license-key_GM1094591345.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-roblox-account-hacked_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spin-coin-master-online_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_off00003101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3101 22636 bytes
SHA-256: dbcff72d56ce44de13f44ce1c7fb6ff88188de02921f0d3a31c2a9c2bdc80398
font_01_sfnt_off000063a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 19656 bytes
SHA-256: 49b1fd422fd7ed2ea36249020224be32ed75ca5a49fe7a2dd7b7413250affd74

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