Malicious PDF — malware analysis report

Static analysis result for SHA-256 6853c8169c72a15e…

MALICIOUS

PDF

45.7 KB Created: 2021-06-07 05:57:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 664e5dad7a1c54e6d3586619e9d7843c SHA-1: b28f9839375fccd7c3ce35d6484b3f3c4d4145a0 SHA-256: 6853c8169c72a15e3e1b19b7f8e0c3f85e97ccc9cbae8e61427b0e9905eab20b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure URL is https://netcdn.tw/app/431946152/how-to-get-any-item-on-roblox-for-free-2021-game-hack, which is associated with a 'free generator / game hack' scheme. The document body and embedded links strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/how-to-get-any-item-on-roblox-for-free-2021-game-hack In PDF document text
    • https://www.tena-g.hr/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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_off00004eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EB1 28108 bytes
SHA-256: 18d92fad214ddd4c35d4523fbc9ddd99c9c8763e5589df5ce719d7e847df6c01
font_01_sfnt_off00008d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D81 19060 bytes
SHA-256: b6f825abeeebf9706b587f940eb4db4fc55f7eb9a6ea104cc21b85cbdf7b095b

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