Malicious PDF — malware analysis report

Static analysis result for SHA-256 07346d38267bb696…

MALICIOUS

PDF

44.1 KB Created: 2021-06-10 20:33:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ee39e5b557505e2bd1e9140bbb16d90f SHA-1: 90ffcace0fa24bf38fa90893f72df0240157151d SHA-256: 07346d38267bb6966c9f25c6d69cdfced593ea891e96534ffd222a76c3b94433
130 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing and an urgency-based lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/free-roblox-dev-to-hire-game-hack.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-roblox-dev-to-hire-game-hack PDF link annotation
    • http://www.zdravazena.sk/images/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-shirts-from-roblox_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-roblox-accounts-not-taken_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-robux-mac_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://www.zdravazena.sk/images/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.zdravazena.sk/images/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f21.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F21 25532 bytes
SHA-256: a7f7fd20e1b5242b84784063b9c7a156e02121629a3d3c97ed222a7c6df7bfec
font_01_sfnt_off0000897f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x897F 18352 bytes
SHA-256: 16f8007dcee3cfdeb6d83659dc0f28831737783c8e11b19e7ecfb66f6cf7d189

Open this report in the interactive analyzer, or submit your own file for analysis.