Malicious PDF — malware analysis report

Static analysis result for SHA-256 48558fd877cf3e6e…

MALICIOUS

PDF

34.3 KB Created: 2021-06-26 19:47:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7f4a2c8c15a39889ccf5e42f37ee10c1 SHA-1: a9f21630a1c94ca8bbc528a4bdc1454f3de5edb7 SHA-256: 48558fd877cf3e6e9970d2da49d5ff314c5a2c4af4cc8f8522f278c6fce0c314
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and currency to entice users into clicking malicious links. The embedded URLs, such as http://netcdn.co/app/431946152/roblox-for-ps4-free-game-hack, are flagged as malicious redirectors. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt, likely leading to further malware download or credential harvesting.

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/roblox-for-ps4-free-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-roblox-to-get-to-the-admin-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/static-moonactive_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/crib-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-account-free-with-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-generator-no-human-survey_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/cheats-for-good-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-hack-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF1 22688 bytes
SHA-256: 47bc46b7ace85e0c752a31064a0c40bfd1f3dde026bc27467282d3ccfba4017f
font_01_sfnt_off000061a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A4 18868 bytes
SHA-256: 4076dbc37f0d352aa868012d30ba7315923508866f674ccb1d6911be0ce61a68

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