Malicious PDF — malware analysis report

Static analysis result for SHA-256 296a1928555a4b52…

MALICIOUS

PDF

49.3 KB Created: 2021-06-03 09:37:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 81300a47eeb58fc5e1701191b1a37fe1 SHA-1: 398be83e98d3935707d8712aa6292adbbaa69c0d SHA-256: 296a1928555a4b52dfd82ed5585ebcf0bd0a68a3220e77cfc199fce41e527927
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The primary lure is a link to 'free Roblox hair game hack', which is hosted on a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at driving traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/how-to-get-free-roblox-hair-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/robux-premium_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-free-robux-com_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_off00005106.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5106 27244 bytes
SHA-256: 5e4524ced8b4636d63676e20cd955a25505db258d5ce5360b7a0eaa7bbc69db3
font_01_sfnt_off00009004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9004 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D16 18564 bytes
SHA-256: ea47dc0c1edfbc9ae5bf1a2aa7313d2e96bd533affdbf7eb9c043917809be324

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