Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8564df6e97fcc3…

MALICIOUS

PDF

48.3 KB Created: 2021-06-04 01:00:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6792492cb0ab9a384f7fc6a5bd2d988d SHA-1: 8036af56380003ff4fa108a09ab79cf0496a84cf SHA-256: 5a8564df6e97fcc3ab12423f2ab55d3671bdb313d621650a0ebe1cf35e7ee2ed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'game hack' and directs users to a URL that is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL, suggesting an attempt to drive traffic to potentially malicious content. No scripts were extracted, but the presence of malicious links and the lure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/479516143/how-to-make-a-modded-minecraft-server-for-free-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/pokemon-go-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-survey_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-home_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://freegiftcodes.euIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53ED 26216 bytes
SHA-256: 89f3f4cb32925f1b9f72ec480ca612bea489efa4cec74203b01cf75551e6d29d
font_01_sfnt_off00009024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9024 2840 bytes
SHA-256: 20e88e247102f07c6a70b4d36c7da419714b68793fc4cb00c42292950da9c9bb
font_02_sfnt_off000099e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99E1 18332 bytes
SHA-256: 59959101681fb4a2744844bcdf3902b1567deffd11dd3ddee6423be8a335a742

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