Malicious PDF — malware analysis report

Static analysis result for SHA-256 58377730387aad92…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 01:33:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 916cbd3edca280b45423cb6afaceaed6 SHA-1: 904a3476a094e60cc4b325b1406ee24ec36068ba SHA-256: 58377730387aad92b1e2128422902ebfacd6ad0305a25ec9aff94d9e18a9d7a3
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The document body and heuristics indicate a lure for free in-game currency or hacks, often associated with phishing or malware distribution. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/406889139/no-verification-coin-master-hack-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-bettergenerator-us_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/pubg-uc-gift-card-free_GM1330123889.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-girl_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-daily-spins-link-2021_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_off00002e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5D 22596 bytes
SHA-256: d142114315555270d5826a57cc69758bbc9352a63dff8067850c9bb0164ddad3
font_01_sfnt_off000060e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E7 18140 bytes
SHA-256: 2eb40c78851d36f006129987f6995a425744f37c3805d43da4635a9766ae6e8e

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