Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56e1c91b07001eb…

MALICIOUS

PDF

45.5 KB Created: 2021-06-04 01:07:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ecbf2db46ba129169b3361ee0d72be91 SHA-1: 3d70b439ca29fa6d5d06204ce3ea6606d2ddc3b7 SHA-256: d56e1c91b07001eba0aa3fbc00902aaf5339c7ad89e3ce402ccdda531d660dfb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a malicious redirector leading to a 'game hack' lure. The ML classifier also flagged this document as malicious. The presence of embedded URLs and the nature of the lures suggest an attempt to direct users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-can-i-play-minecraft-for-free-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pubg-uc-kart_GM1330123889.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://code.giftcards.comIn 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_004_off00005629.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5629 25316 bytes
SHA-256: df7654999352c9bcc9841b9f0e1babba861d96cf9f399f08f4f42af33dd7bb37
font_01_sfnt_off00008f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9A 18284 bytes
SHA-256: cc9f65e76ff55973cb5eb44e8d52a3d8c8dc11961be9de6072311badebd77d80

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