Malicious PDF — malware analysis report

Static analysis result for SHA-256 a94db4496563c7cf…

MALICIOUS

PDF

43.6 KB Created: 2021-06-09 04:08:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: caaf69af53dce49195194b03f161f7e6 SHA-1: 100792b2a4576cd3f8c2b166f1143550100c0f1a SHA-256: a94db4496563c7cf4ec5fc483aa28ff006a51e8c7a871d43f8f000ca68a61092
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) 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 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/que-hacer-cuando-te-hackean-roblox-game-hack PDF link annotation
    • http://www.vetmed.fkh.unair.ac.id/repository/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-without-human-verification-ios_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/descargar-hack-para-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/daily-coin-master-free-spins_GM406889139.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
font_00_sfnt_off00004fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEE 23956 bytes
SHA-256: d05ee073dca9fd238d4b5f1719dfae4b043b89cd4f45d42d11b1a0833acfaea1
font_01_sfnt_off00008686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8686 18652 bytes
SHA-256: a9f4010dbe3ccfd1d75cc3abc5556c7ae1659675efa2cd5efb3f0ae491371c1c

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