Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a77db7a3cdd1499…

MALICIOUS

PDF

227.9 KB Created: 2021-07-05 22:10:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0091738404a7d68e4d2a650329f25ebb SHA-1: 41140c1fc453a5e25832abfb4be6ecffb2a59e86 SHA-256: 6a77db7a3cdd14999b1d3af57e03ab6f561b1d4f5761672bd44d019f963bea15
172 Risk Score

Malware Insights

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

The PDF document employs social engineering tactics, presenting a fake CAPTCHA and a 'free download' lure to trick the user into clicking a malicious URL. The embedded URL, http://netcdn.tw/app/1094591345/pokmon-go-free-download-apk-game-hack, is likely intended to lead to malware or a further phishing attempt. The document's content and heuristics strongly suggest a phishing or malware distribution scheme.

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/pokmon-go-free-download-apk-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb/repository/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-robux-hack-no-servey_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/robloxcom-avatar-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hacks-for-trading-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-get-roblox-clothing-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-roblox-for-robux-via-console_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/facts-about-the-2021-roblox-hack-attack_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-download-nd-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/get-robux-today_GM431946152.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_023_off000322be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x322BE 25576 bytes
SHA-256: c1acdb0f97d60b7244c300b919db76c907c5ffc81a7d29aada2ac7c2c1bb72e9
font_01_sfnt_off00035ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35EBE 19112 bytes
SHA-256: d5a4ad7e17b8e12f8922556f61771f037ce720b4aea372412207a716bd7809fa

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