Malicious PDF — malware analysis report

Static analysis result for SHA-256 088154a8c4b0a47b…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 16:16:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e1ddc79b090ff92959bbb5441f218397 SHA-1: d3327888a86917400cfe146c2db3c277c8d05aed SHA-256: 088154a8c4b0a47b07bae52102076a527d8aa99fb1aec8cecf2c38bf5c4351cc
142 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 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 0.9980

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: http://netcdn.co/app/431946152/hack-for-knights-revenge-roblox-game-hack.
  • 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 http://netcdn.co/app/431946152/hack-for-knights-revenge-roblox-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-roblox-gameplay_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/abs-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/tiktok-free-cuthbert_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/download-file-robloxhackstoolv2zip_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-no-kind-of-surveys_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/mobihack-net-roblox-hack_GM431946152.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_off000030c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C2 22096 bytes
SHA-256: c98aa43f0ebf1b425dc847e8f4cbd8f9132acdc53a794eabda1ba3f0213ff496
font_01_sfnt_off000061a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A4 19324 bytes
SHA-256: b2fae891dc0ddbaf9685ad2d8602201a3539013e3225a0cbe3bea0d1f5569bd8

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