Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4271f74edc5b80…

MALICIOUS

PDF

48.2 KB Created: 2021-06-13 22:57:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4253a81f65b8e2279c92fcd161f3f0fa SHA-1: 0d9fa8a3f90d12add19fa85c55e9d999563ea349 SHA-256: 2a4271f74edc5b803db3ebebd426602819ad2e2df8a1de839cffa7db82ecddf0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs that lead to known malicious redirectors, specifically promoting 'game hacks' and 'free currency' lures. The document body and heuristics indicate a clear intent to trick users into clicking these links, likely leading to further malicious content or downloads. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 4

  • 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.
  • 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.co/app/431946152/how-to-get-free-robux-on-mobile-easy-game-hack In PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/claim-free-robux_GM431946152.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_003_off00004d01.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D01 27756 bytes
SHA-256: 2079442cae6baf683530eaf909fc90923ded41fd3b128c09fad32e71cbdcb003
font_01_sfnt_off00008b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B14 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000097bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97BC 19080 bytes
SHA-256: cfc6f4cbe1984aff81ecb3ef9297f206a4c36544f842b7dd3c73ad72bab14606

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