Malicious PDF — malware analysis report

Static analysis result for SHA-256 930693a6366caf78…

MALICIOUS

PDF

33.5 KB Created: 2021-07-08 05:24:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5b93cff60c518817822fd92068e86beb SHA-1: 39cc856599f57023a0e40c4080b327e5d4b36fc7 SHA-256: 930693a6366caf784e39c4a63bf12ed16b08f68f247850e996d54da911d89a87
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free in-game currency and hacks to entice users. It contains multiple embedded URLs, including a primary malicious redirector at http://netcdn.tw/app/431946152/free-robux-clothes-game-hack. The document's structure and embedded links strongly suggest it is designed to lead users to potentially harmful websites, likely for credential harvesting or malware distribution.

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-clothes-game-hack In PDF document text
    • https://www.knjiznica-oroslavje.hr/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/actual-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/hacking-brothers-roblox-account_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/how-to-wear-no-clothing-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/roblox-plane-blueprints-free_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-talk-to-roblox-if-you-get-hacked_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/earn-free-robux_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_off00002de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE8 21744 bytes
SHA-256: 04814f4027927dffdc513c8ed85ae6f4a31b50433c73bcc9fcd86d4c45451fca
font_01_sfnt_off00005dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCF 19060 bytes
SHA-256: 97364360b0ef57788754a1eb8a616304bf845de832d3f27808b1c0193cfeafc1

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