Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb49e2c22a0b958e…

MALICIOUS

PDF

34.0 KB Created: 2021-06-26 09:17:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6f2ac26846cc23417c5e8ed6622eb8b3 SHA-1: beae3bcb8ceca95b6b07d951cf4b7e9beb50fccb SHA-256: bb49e2c22a0b958e8f605bb5ad0ed302696cb3be3e1ad7a97969609cf63c2bf6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game items and hacks. The primary redirector URL is http://netcdn.co/app/431946152/free-roblox-items-catalog-game-hack, which likely serves as a gateway to further malicious content or phishing pages. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a social engineering attack.

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-roblox-items-catalog-game-hack In PDF document text
    • http://knjiznica-oroslavje.hr/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/pokemon-go-free-100-iv_GM1094591345.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/what-pubg-uc-code_GM1330123889.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-roblox-combat-scripts-for-studio_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/hack-roblox-galaxy-itan_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/roblox-game-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/get-free-spins-coin-master-link_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_off00002f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F13 22016 bytes
SHA-256: 0599674e34acab23a755b7770ae8d7fb08c5adbbdf44bdbd472bf5b593144f31
font_01_sfnt_off00005fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD0 19016 bytes
SHA-256: e05a2dd517f71e679b44b6c24f8ae16f0db8e0fd9d9005e3c9437b75876025b4

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