Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d602c22a0e5074…

MALICIOUS

PDF

49.2 KB Created: 2021-06-03 14:38:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: dcddfafa5be7884457d50349651ecd59 SHA-1: aea0f653e55ccf14f5847cd1432b222e9a8efcd2 SHA-256: 60d602c22a0e50747d3f4f1ca2d636a095b0c5cb9caa40048ce3aef59ad5b46e
200 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. It also presents a fake CAPTCHA to trick users into interacting further. The presence of these lures and malicious redirectors strongly suggests an attempt to lead the user to a site that likely hosts further malware or phishing content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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
  • 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 https://netcdn.online/app/431946152/free-robux-working-game-hack In PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005032.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5032 28436 bytes
SHA-256: 620ffb524db56cff11bce58d9a0368d243c39e237f6dfa915d23f6052503967f
font_01_sfnt_off00008f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F85 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C2D 18788 bytes
SHA-256: 146362cb081aa7c6718ebc51132ca2538876dc1922f8d33668898621d3d02efe

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