Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd9d5b0de2a99ce…

MALICIOUS

PDF

41.3 KB Created: 2021-05-13 23:33:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: db8b66ef03f584757f1bb79a0c87598b SHA-1: 80b757c8bc7dcdc5dbecae2e6f64f26fd4d82297 SHA-256: dfd9d5b0de2a99ce8a253f73728878bb91b98e7cd426b6743b8dac0208aafdd0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'Coin Master' game hacks and free spins. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lure users to malicious websites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-free-cards-link-game-hack In PDF document text
    • http://optiquedelavaunage.com/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.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_003_off000047db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DB 24392 bytes
SHA-256: d7dbcc98bfb045e69888a16e784edcbe808f5edfb44b48275f1ea786789a2295
font_01_sfnt_off00007fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB9 18056 bytes
SHA-256: 4c00fba11e6222d30ce91962ad0846eff86227a46da4e4704094e367f0981575

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