Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a6d1a3c3bddf24…

MALICIOUS

PDF

227.4 KB Created: 2021-07-05 23:18:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 24696d1d805420a67a7572d86d3362b5 SHA-1: 6a34da31c5e19be843e053c79f79b0662b9116b1 SHA-256: 44a6d1a3c3bddf2412e267de0625a4a8d43816848e218cfefa3742bc1c98574c
250 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector, disguised as game hacks and free generators. The document body and heuristics indicate a lure to trick users into clicking these links, likely leading to further malicious content or malware. The presence of a fake CAPTCHA heuristic suggests an attempt to further social engineer the user into executing commands or interacting with malicious content.

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-five-free-raid-passes-game-hack In PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/roblox-how-create-a-hacking-place_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/install-hacked-roblox_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/slaying-simulator-roblox-no-cheat_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/g00d-hack-roblox_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-hack-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-robux-hack-for-mac_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/where-to-get-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-free-draw-2-alpha_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_023_off0003219f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3219F 25576 bytes
SHA-256: 7109ed106f74f65f69cb5d585077ccd2f1a26a9161ee116ece46ccd84bdeefa4
font_01_sfnt_off00035da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35DA9 18764 bytes
SHA-256: 4daf24127a258cd83fdb67aaeafa8f145c195f7dacedaebebd91f9eb209591ae

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