Malicious PDF — malware analysis report

Static analysis result for SHA-256 0807115a97274bf7…

MALICIOUS

PDF

42.6 KB Created: 2021-05-15 02:49:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: aac5ff44d2a87942592ffef06a9e59ed SHA-1: 19b7bb343a8025d00bfb9dfa42cd31888fe89b94 SHA-256: 0807115a97274bf7009f8bc4a2a03af82d4318020fc42165a2ea5c7cd6ccf74b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for game hacks and free items, directing users to a malicious redirector URL. The presence of embedded URLs and a visual download button suggests an attempt to trick the user into clicking through to a malicious site. No scripts were extracted, but the overall pattern indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/free-dominus-roblox-game-hack In PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-to-get-free-robux-fast-and-easy_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_003_off00004b3b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B3B 24296 bytes
SHA-256: 7ba69842fb4d4bc4dfc667044482edf63dfe189835cd9155160a180881cc8cb6
font_01_sfnt_off0000831b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831B 18636 bytes
SHA-256: 46fcbd6c3115277ac11b91f3289357a32fe2ba94719b4dbd56ea725e5d096b3c

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