Malicious PDF — malware analysis report

Static analysis result for SHA-256 53bf78f6d7046802…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 04:53:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 08a732b0c21ac8bb88c21efd3819b2df SHA-1: 6ca4259f5b7c1377ad4ff3dccb2aa1c655d16443 SHA-256: 53bf78f6d704680256460eee18d10dd75631c276ea755ea7555727b7e14afe45
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, luring users towards 'free Robux' or 'game hacks'. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The document's content and embedded URLs strongly suggest a social engineering tactic to drive users to potentially harmful sites.

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.co/app/431946152/free-robux-extensions-game-hack In PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/hacks-en-roblox-volar_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/executor-roblox-free-no-hack-promise_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/how-to-get-any-aduio-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/how-to-get-free-roblox-items-2021_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/how-to-hack-roblox-mad-paintball_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/admin-vs-hacker-roblox-1_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/how-to-get-free-limited-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/roblox-how-to-upload-custom-thumbnails-for-free_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/free-robux-generator-2021-working_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/games-that-have-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/does-robux-hacknet-work_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/roblox-free-robux-no-survey-or-download_GM431946152.pdfIn PDF document text
    • https://e-learning-mi-nurussaadah.com/__statics/gudangsoal/files/free-roblox-2021-unlimited-codes-for-kids_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_off00002fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC8 22124 bytes
SHA-256: a73dbed79371f21ff3aa7b5c74465f2a685621fbf71028dbb2b7156729338835
font_01_sfnt_off0000609d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609D 18940 bytes
SHA-256: 8d3efab9b568d206e60f795c87af3d1dc1d95f562b565fb49bfac07c62f3ebc0