Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8e67700d9daff8…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 08:19:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9afd3df3dcd6b8208842d42df24811c9 SHA-1: c861a5e53a4b4dfd33a7300f8d5b5d5ea8cc3245 SHA-256: 0b8e67700d9daff82afc940c47b5d679aac3465b6ac3f0b515a571b9faed87b6
200 Risk Score

Malware Insights

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

The PDF contains multiple links to a known malicious redirector, specifically advertising a 'Coin Master Spin Hack'. The document body and heuristics confirm this lure, aiming to trick users into visiting the malicious URL. The presence of embedded URLs and the nature of the lure suggest an attempt to deliver a secondary payload or lead the user to a phishing site.

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/coin-master-spin-hack-no-verification-game-hack In PDF document text
    • http://library.umuslim.ac.id//repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-hack-be-other-players_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/hacker-vs-noob-vs-pro-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-you-doing-l2-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-how-to-get-free-shirts-2021-working-with-voice_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/www-roblox-cheat-us_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/expensive-avatar-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/robux-sites_GM431946152.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_off00002f66.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F66 23676 bytes
SHA-256: add84be2517fdc55715e4dc9320d993823623b9e209ec608788e8d411726af9c
font_01_sfnt_off00006525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6525 18312 bytes
SHA-256: 3c52600db59986243a0571f9d94979089bd819b33fd5a3bf9f13833b43aedf21

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