Malicious PDF — malware analysis report

Static analysis result for SHA-256 c93b0f7ce6f60646…

MALICIOUS

PDF

227.4 KB Created: 2021-07-06 09:27:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e953333107a10a79189babbbe2d39e85 SHA-1: 32da4da095462db4ce0b2a90924a7a18d39b484f SHA-256: c93b0f7ce6f606465284b07268ebb16ab0be1cdae353a2cb08d4b920005ef1cc
250 Risk Score

Malware Insights

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

The PDF contains multiple links to a malicious redirector, disguised as a 'free generator' or 'game hack' for popular games like Pokemon Go and Roblox. It also presents a fake CAPTCHA and a browser extension installation lure, common social engineering tactics to trick users into executing malicious content. The primary lure directs users to a known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 7

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-rare-candy-game-hack In PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/anarchy-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/robux-hack-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/cheat-roblox-superpower-training-simulator-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/carding-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-4-mobile-24-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-wall-hack-script_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/daily-spin_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-animations-on-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/followers-hack-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spins-coin-master-without-completing-offers_GM406889139.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_off000321f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x321F5 25576 bytes
SHA-256: 332af2d4ec262f82b9df9e6719c5f3d0ff2373233f666b7b0094f9a8162d127a
font_01_sfnt_off00035df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35DF6 18712 bytes
SHA-256: 33f7aba69edbc262e7f003a9ab6bd60d13afd6bc10333dfa04325793e095c2da

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