Malicious PDF — malware analysis report

Static analysis result for SHA-256 7545477de6d2427c…

MALICIOUS

PDF

250.8 KB Created: 2021-07-06 09:11:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f52098394346fa8003c8a9ef4e77b899 SHA-1: a57db3ed13d83a612a05096d8cb5ead153fabb70 SHA-256: 7545477de6d2427cce7abc57eb5fef606a74579828a3e53561c46e297d860c56
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Steal Application Access Token

The PDF document contains a link to a 'game hack' website, impersonating the brand Apple. It employs lures such as a fake CAPTCHA and MFA prompt to trick the user into clicking the link. The primary URL, http://netcdn.tw/app/1330123889/pubg-uc-official-app-game-hack, is the most critical IOC, as it is the destination for the phishing attempt.

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-official-app-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-official-app-game-hack PDF link annotation
    • https://katalog.smkn1glagah.sch.id/repository/hack-roblox-accounts-free_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/cite-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/cheat-roblox-lumber-tyccon-fly_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-com-toys-free-codes_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/hunting-rifle-script-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-bank-tycoon-free-vip_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-long-shold-the-account-stealing-hack-on-roblox-last_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/hack-coins-pizzeria-roleplay-remastered-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-hack-exploit-jailbreak-gui-hack-working_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
stream_024_off00037e60.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37E60 26028 bytes
SHA-256: 8aab5b1e56ed56050708e7127c6c40039081c8357d8c7d757ea5b85152328571
font_01_sfnt_off0003bba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BBA3 18496 bytes
SHA-256: b39c9621050e69e99ef0f403ee20fbe8a70dbb21d06e7bca4d175a4df9427598