Malicious PDF — malware analysis report

Static analysis result for SHA-256 08252f4eeb1b3ddc…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 21:12:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e72dcedfc16263a3921ed581dcf23234 SHA-1: c872d4dfb3602a01cddad60bf844f8fd4dc69e12 SHA-256: 08252f4eeb1b3ddca082b515fa1ff4110df3602cf359f7d293e0b06ba28db318
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'free generator / game hack'. The document body reinforces this lure by mentioning 'Free Attacks On Coin Master' and includes the malicious URL. This indicates a phishing attempt designed to lead users to potentially harmful content or further malware 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/free-attacks-on-coin-master-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/robux-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/assassin-roblox-free-tokens_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-robux-on-xbox-one-for-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacked-roblox-shirt-forums_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/acount-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-how-to-hack-into-accounts_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/jetpack-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/electrification-free-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-accounts-roblox-2021-september-2021-live_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-font-free-download_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-hax_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-promo-cides_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
font_00_sfnt_off00002f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F74 22532 bytes
SHA-256: 33434371b368790959c4028c632c129153ab5cabfd69774c5c752fedd54534c6
font_01_sfnt_off000061a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A9 18168 bytes
SHA-256: 43abfb39722ac35456cab2146e99d839ad875e13a0429ae15e438ba8c232cde3