Malicious PDF — malware analysis report

Static analysis result for SHA-256 7657f7e138e6ba44…

MALICIOUS

PDF

41.5 KB Created: 2021-05-12 13:00:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c88dce90047bb7f6e5db99400a9ac898 SHA-1: bac9fb8accacb4dc0ec95478cf56861456fdacb9 SHA-256: 7657f7e138e6ba44a6fc3deb3883a6f92ce6794fa59f66631b289d7dce262b55
160 Risk Score

Malware Insights

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

This PDF document employs a common lure, promising free game currency and hacks to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or phishing pages. The document's structure and embedded links strongly suggest a phishing or scam campaign aimed at tricking users into visiting potentially harmful websites.

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/406889139/coin-master-free-spins-link-2021-game-hack In PDF document text
    • http://icomsolutions.com.au/images/robux-survey_GM431946152.pdfIn PDF document text
    • http://icomsolutions.com.au/images/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://icomsolutions.com.au/images/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://icomsolutions.com.au/images/roblox-gang_GM431946152.pdfIn PDF document text
    • http://icomsolutions.com.au/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://icomsolutions.com.au/images/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://icomsolutions.com.au/images/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://icomsolutions.com.au/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://icomsolutions.com.au/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://icomsolutions.com.au/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://icomsolutions.com.au/images/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://icomsolutions.com.au/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://icomsolutions.com.au/images/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://icomsolutions.com.au/images/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • http://icomsolutions.com.au/images/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://icomsolutions.com.au/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://icomsolutions.com.au/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://icomsolutions.com.au/images/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://icomsolutions.com.au/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://icomsolutions.com.au/images/free-roblox-usernames-and-passwords_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_off000047a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A9 24156 bytes
SHA-256: 64d584f2058cf85b4b9c88d0ee733fbe4d20277c50041cf952e5388279a67de0
font_01_sfnt_off00007f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F12 18456 bytes
SHA-256: 405c435adaafa0da304b7a4986d8f56c56dc87ed278d5cff2ac0c57977d8d7e3

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