Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5a805a76bd911b…

MALICIOUS

PDF

250.5 KB Created: 2021-07-04 08:28:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 820e5e071ea7352aa00ae1d280f32c8d SHA-1: ab187cfede50b08d6160ade5af8964cc277baf61 SHA-256: ce5a805a76bd911b66912ab72a0ea96b7a27eed00e4919fb79630191939ede6d
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-4all-cool-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-4all-cool-game-hack PDF link annotation
    • http://library.umuslim.ac.id//repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-february-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-obby-limited-time-only-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-gift-codes_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robux-hacktxt_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-robux-2021-by-batu_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/pokemon-go-free-coins-without-human-verification_GM1094591345.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-robux-for-free-no-scam_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-se_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/robux-gainer_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-items-catalog_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-the-best-cheat-engine-hack_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-hack-online-generator-without-human-verification_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_off00037d4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37D4C 25928 bytes
SHA-256: 1c42fbaad9598afb76d5a6be6efd8d024ef951266389d04d0c70efb9e1cf993e
font_01_sfnt_off0003ba64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BA64 18404 bytes
SHA-256: 459e11b0f71e09871a4ba96027c78f2e38e2c3965137c32779afd9886dbcb2af

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