Malicious PDF — malware analysis report

Static analysis result for SHA-256 2090a71406f3bdef…

MALICIOUS

PDF

34.2 KB Created: 2021-06-30 07:56:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 41dbc0f84495af91758f750c3b3da28a SHA-1: 4033e86679e755858202071e39a58081dd0f3ec9 SHA-256: 2090a71406f3bdef52e01d2f686ece14f76024fad9d8755531eb8e655a4e21ae
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as 'free game hacks' for popular games like Roblox. The ML classifier strongly flagged this PDF as malicious, and the presence of a visual download button lure further supports a malicious intent. The primary attack pattern involves tricking the user into clicking a malicious link, likely leading to further malware download or exploitation.

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/bandit-roblox-free-game-hack In PDF document text
    • https://planetzoe.hr/files/roblox-sword-hack_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://planetzoe.hr/files/roblox-free-skin_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/simple-roblox-hack-hp_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/money-and-ranking-hack-roblox-link_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/show-me-how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/hack-dinero-en-roblox_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://www.planetzoe.hr/files/youtube-roblox-free-tops_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/roblox-hack-chrome-web-store_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/how-to-transfer-robux-to-another-account-free_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/free-virtual-item-codes-roblox_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • https://planetzoe.hr/files/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 3

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
stream_002_off00002ce1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CE1 22912 bytes
SHA-256: aa5cd61f56d62c4bae8b99ae8b6fcbf1107a6710efc228e9c8cf168ddf5f79af
font_01_sfnt_off00006067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6067 19048 bytes
SHA-256: 821153c6551f2e690bb0f96c722ee881eaf068fcde05751820565b0e6e310043

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