Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e29eaac6b177465…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 08:55:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9eb27b9345249c27d86c4ceaf1302085 SHA-1: 7878b366e2297fb08cf96daa2493679a67b05bae SHA-256: 7e29eaac6b1774656d52fd1afb72f1101a67689689d2d4fa816cb27289ae4905
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, disguised as game hacks and free spin generators. The primary lure URL is http://netcdn.tw/app/406889139/where-can-i-get-free-spins-for-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at redirecting users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/where-can-i-get-free-spins-for-coin-master-game-hack In PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-login-hack-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/girl-clothes-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/does-bc-on-roblox-give-a-free-trial_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-black-hair-free_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/command-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-no-offewrs_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/pokemon-go-free-643_GM1094591345.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-heaven-free-spins-today_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
stream_002_off00002fe9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FE9 22852 bytes
SHA-256: d9cfaa0e7a94a95fcbe269f5bc7e2b6a847fa7d575bad7c3b6fd0ffbd0aae292
font_01_sfnt_off0000634b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634B 18540 bytes
SHA-256: b12aa12d38c8c524e7797586759798b9ea71944b9981e44aaeae315634813687

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