Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d192a37cf9e31f…

MALICIOUS

PDF

34.6 KB Created: 2021-06-28 07:51:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f29a25f14398362815a28781963a864d SHA-1: 87d3743f0bcc490cd7c0907959c3183b2b7657c1 SHA-256: 54d192a37cf9e31fc2a3016ba26dad895736faaa335711c7f78a694c18ead70e
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack' for Roblox. The document body and embedded URLs reinforce this theme, pointing to various 'hacks' and 'generators'. The presence of a 'password-protected archive handoff' heuristic suggests the user is instructed to download a password-protected file, a common tactic to bypass security filters. While no scripts were extracted, the overall pattern indicates a lure for downloading potentially malicious content.

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.co/app/431946152/free-roblox-passwords-2021-game-hack In PDF document text
    • http://library.stembi.ac.id/repository/roblox-cheat-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/viper-venom-fabulous-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-get-free-cars-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/5-games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-exploit-download-for-free_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/jailbreak-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-prison-life-btools-hack-download_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/can-you-get-cuaght-for-hacking-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-catalogs-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-roblox-hack-script-executrer_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/black-magic-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-robux-generator-for-roblx_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-btools-hack-script-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-hack-roblox-account-script_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-roblox-giveawayscom_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-free-clothes-group_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/get-free-robux_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_off00003001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3001 21952 bytes
SHA-256: 16f527d5cabbf746ab6fc155a3dbb65e1708276cd21ca7ba9d8233bbf5220176
font_01_sfnt_off0000609f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609F 19544 bytes
SHA-256: e4d03d673b5c0febe36ef1d80c7043984ded6e862f7ddff9392521686af024b3

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