Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5042747b7c2204…

MALICIOUS

PDF

35.5 KB Created: 2021-06-20 08:06:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e16bfbb87bd56eb018425177dc5376a3 SHA-1: 8dfb4f6c3590306d58d5e1b4129d33b58a5b835a SHA-256: fa5042747b7c22042cfe0876c3a586eedaeb046ac7999e22e89e207fa498ba26
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free generators" for popular games. The primary lure URL is http://netcdn.co/app/431946152/how-to-hack-for-robux-on-roblox-game-hack, which is identified as a malicious redirector. The document body, though partially corrupted, contains similar lure text and URLs, suggesting a social engineering attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious redirectors and the lure content strongly indicate a phishing or scam attempt.

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/how-to-hack-for-robux-on-roblox-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/pubg-uc-purchase_GM1330123889.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-stats-on-roblox-game_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-game-download-hacks-studio-login-guide-unofficial_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-for-free-glich_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-download-google-play_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-builders-club-code-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hacks-for-island-royale-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3398 22444 bytes
SHA-256: d2e405cd2f2692141c548a72e05912cf0359cff82a1aa17ac53a3a9cd2524a68
font_01_sfnt_off00006564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6564 19124 bytes
SHA-256: ca7d090c5d97e57af98ebf32d8911a45902328ddffa24efdd460d3a06161e52f

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