Malicious PDF — malware analysis report

Static analysis result for SHA-256 7639ec1d0ae5f07f…

MALICIOUS

PDF

228.2 KB Created: 2021-07-05 01:34:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 605ac64f4db1fab6379c1f9ef808e3cc SHA-1: abe0e2ca168b69889dfbe9e4f6bfa7a15cb09994 SHA-256: 7639ec1d0ae5f07f4863c9bf9b35e2cfc7cb0099d4226a57410befb57edd3e4a
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1204.001 User Execution: Malicious Link

This PDF document was flagged as malicious. It uses a fake browser/software-install lure and a fake-CAPTCHA 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 0.0118

Heuristics 7

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/1094591345/pokemon-go-free-643-game-hack PDF link annotation
    • https://ciptawiratirta.com/assets/CKImages/files/tiktok-free-follower-no-human-verification_GM835599320.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-hack-a-account-in-roblox_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-robux-no-human-verification-no-download_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-limited-button-roblox_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-money-hack-rocitizens_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/emojicode-roblox-2021-get-emojis-free-2021-d-_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/infinte-fly-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/pubg-uc_GM1330123889.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_023_off00032476.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32476 25728 bytes
SHA-256: 71a10ff406292e16bbc768009649eaf8538b3508b67fa546ee066bb25ee2da18
font_01_sfnt_off000360aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x360AA 18760 bytes
SHA-256: 012f92c5760f70a2d22421306c1d4a17a3a03515f3ed7177754691022c66dfb0

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