Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90718070ce65f4c…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 09:06:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6533a1899f0850633af28e591f1b8959 SHA-1: 1e05dda661941c6221e135717c4b394a64d87343 SHA-256: a90718070ce65f4c1f927d4a990bcb4d474b5c5fb814527f60c5b843c7aadb93
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links designed to lure users into clicking on what appears to be a generator or hack for popular games. These links redirect to malicious infrastructure, specifically identified as a redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack pattern involves social engineering via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-no-pass-required-game-hack In PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/roblox-does-free-follower-game-real_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/how-to-get-free-robux-in-roblox-2021-easy_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/711-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/how-to-upload-roblox-audio-for-free_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/roblox-highschool-2-hack-script-pastebin-money_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/robux-cheat-pc_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/free-mod-apk-coin-master_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_off00003015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3015 21968 bytes
SHA-256: eaac9dbdf48c3732f5636f5ea91c52ba1c7ee9c936c1fd996ce81b338c13f356
font_01_sfnt_off000060c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C2 19336 bytes
SHA-256: c69bd2675d95f2173e6b678ce20e5fdb28c77c4f61130147ca756c5bf9fa1b3b

Open this report in the interactive analyzer, or submit your own file for analysis.