Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ad34c09c7bae1b…

MALICIOUS

PDF

44.4 KB Created: 2021-06-07 14:53:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 21b7ce6b63a2e26fda4dc1ae515770f2 SHA-1: 6fe4818bd13998394cde00f88e52d8ec66516e98 SHA-256: a2ad34c09c7bae1bc9042b078ec8d6b61d5e432d49f11c08d0be8970000f3900
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures related to game hacks and free items. The primary malicious URL identified is https://netcdn.tw/app/431946152/good-free-items-on-roblox-game-hack, which is presented as a call-to-action within the document body. The document's structure and embedded links suggest an attempt to drive users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/good-free-items-on-roblox-game-hack In PDF document text
    • http://apostolosandreaslemesou.com/images/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/pubg-uc-top-up-center_GM1330123889.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/linoria-hub-roblox-free_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/pubg-uc-100-bonus_GM1330123889.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/create-minecraft-server-free_GM479516143.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_004_off00005172.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5172 24864 bytes
SHA-256: a6c7b394a8aca5eda165b358be3d79bd591e3fb6fe91980b173f7aa4eb5076b9
font_01_sfnt_off00008a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5B 18488 bytes
SHA-256: 02067d091b0bdbbf5154025d4f09ed06c032988ab3520a5c54ab0d91b4000953

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