Malicious PDF — malware analysis report

Static analysis result for SHA-256 1936016b5ef637d3…

MALICIOUS

PDF

34.5 KB Created: 2021-07-09 19:15:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: df138aa70c8dfc990861ad57f0d7697e SHA-1: 1785d5507f6c38ded916b616270465ba47946ca0 SHA-256: 1936016b5ef637d37a47c386b415cb1fe23688e63935b47c88cc7ea33dbad2d2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/free-robux-no-verification-no-survey-game-hack. The document body and heuristics indicate a lure for free game hacks or generators, designed to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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.tw/app/431946152/free-robux-no-verification-no-survey-game-hack In PDF document text
    • http://www.vista-design.hr/files/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/roblox-is-free-to-play_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://www.vista-design.hr/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/coin-master-village-3_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/how-to-get-free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/pubg-uc-voucher-code_GM1330123889.pdfIn PDF document text
    • http://www.vista-design.hr/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/roblox-boy-hair-free_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-roblox-accounts-v3rmillion-2021-august_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/hack-naruto-final-bonds-roblox_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/pubg-2021-uc_GM1330123889.pdfIn PDF document text
    • https://www.vista-design.hr/files/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/how-to-get-free-bc-on-roblox-ipad_GM431946152.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_off0000303b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303B 21872 bytes
SHA-256: 5b76c44c539397f3948c2f817cbcb4cf110627cc75d73f272466b96ca0bb0f78
font_01_sfnt_off000060a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A9 19368 bytes
SHA-256: d2bc0c8d4e358c38b8ed3dc3975a0dd6f30757aab53430b3c6877dec44a024de

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