Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bd0f4d402802a8…

MALICIOUS

PDF

49.4 KB Created: 2021-06-03 05:41:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 081025a13779f1ddb0d2100342cbd3a1 SHA-1: 3b5957422cd195d7830a3da14ed90f0ebeaf6706 SHA-256: 93bd0f4d402802a8846824a594b54fb99ee1088d5c21cbf65ebc5c6ca844209a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. The presence of a fake CAPTCHA heuristic indicates an attempt to deceive users into executing further actions. The document contains multiple embedded URLs, with one prominently linked to known malicious redirector infrastructure, suggesting it serves as a downloader for potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/406889139/free-spins-coin-master-hack-2021-game-hack In PDF document text
    • http://library.apsidoarjo.ac.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/earn-rbx_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000056c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x56C9 25476 bytes
SHA-256: f580d9e7077872bdcba5c89000162db5629e2f500ec386abb02f4537aba58673
font_01_sfnt_off00009045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9045 4020 bytes
SHA-256: 7d3617ecf51e14e6cffc9372c4441988c3b6cb3ea010f7512aee6af842ef388d
font_02_sfnt_off00009dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD0 18456 bytes
SHA-256: 8f74d6ddd2abce9f563610cbfcc253ce51c057807514da134dc64dcb58b7111e

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