Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af7ade6e4062190…

MALICIOUS

PDF

250.0 KB Created: 2021-07-06 03:15:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fb152a4e11a590322232f9d8b555ab10 SHA-1: d1cd232df794f996d0158fee19d3f84951615c2c SHA-256: 3af7ade6e4062190383ba3874684b05d6866d9a07ddaf84f9b617dd76453c5b8
180 Risk Score

Malware Insights

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

This PDF document was flagged as malicious. It uses brand-impersonation credential phishing, a fake-CAPTCHA lure, an MFA/2FA-themed lure 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 clean score 0.0098

Heuristics 8

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.tw/app/1330123889/pubg-uc-carding-website-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 http://netcdn.tw/app/1330123889/pubg-uc-carding-website-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/izuku-midoriya-roblox-free-shop_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robux-cheaten-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-you-get-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-adder-tool_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/get-robux-for-free-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-exploit-with-cheat-engine-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/bit-slicer-speed-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-giver-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/secret-robux-hack-revealed-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/a-game-on-roblox-that-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-and-coins-haktuts_GM406889139.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
stream_024_off00037a58.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37A58 25928 bytes
SHA-256: 879e573c429ccc6e92316bf706d3b94119427834e2d05777d105431ff4863cc8
font_01_sfnt_off0003b76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B76A 18720 bytes
SHA-256: 0158afeaff671ccce58c40015b663bddddfad75c84d4e0929a006ea8b25d491c

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