Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc7fb72b2dcf4f5…

MALICIOUS

PDF

36.2 KB Created: 2021-07-03 22:50:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 492ede40e23ad3d71a15b5bfbe93a940 SHA-1: a9afad33cda60fbc38392afcaff2a41b2ef83695 SHA-256: 4bc7fb72b2dcf4f515352f780fa0bd4739e23936d019f7f8de4a35b9adc8f324
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/406889139/coin-master-hack-no-survey-2021-game-hack PDF link annotation
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/is-pokemon-go-free-to-play_GM1094591345.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/roblox-free-maps-download_GM431946152.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/static-moonactive_GM406889139.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/pokemon-go-free-xp_GM1094591345.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/hacking-heists-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/gift-card-roblox-free-2021_GM431946152.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
stream_002_off00003486.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3486 23292 bytes
SHA-256: 7d62134ccf57a0a8ebc627e878ae36cf873460a3cc8795336d9039592c9bedd7
font_01_sfnt_off00006909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6909 18840 bytes
SHA-256: 6a18929cdf9c35e2b0e357807eca87b704d2b222892c5fc5c09c557ea51c2db7

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