Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a6c1ba3c8c9861…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 20:10:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 949c13f3a540e542c6101bb62f3a2b27 SHA-1: 8136a5da62078e77c4c8041f746c2413e06cbe41 SHA-256: 72a6c1ba3c8c9861c2b181a6a9366f3300e719350aadfee4d056cbf6da19b00d
160 Risk Score

Malware Insights

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

This PDF document employs a lure related to free in-game currency for popular games, directing users to a known malicious redirector. The document body and heuristics indicate a phishing or scam attempt designed to lead users to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a workflow that likely involves exploiting PDF vulnerabilities or redirecting users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/406889139/get-free-spins-coin-master-2021-game-hack In PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-get-free-robux-aiden_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/cute-girl-avatar-on-roblox-copyable-free_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/probloxicu-robux-free_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/a-vide-on-how-to-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/hacks-for-pet-ranch-roblox_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/ahegao-hoodie-roblox-free_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-hack-script-python_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-robux-limited-time-game_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-log-out-of-coin-master_GM406889139.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
font_00_sfnt_off000035e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35E2 22772 bytes
SHA-256: 82e6d9e915bea181ba523187d3d5b461d522811cd257d92bf4a393b9291bf84d
font_01_sfnt_off00006892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6892 18576 bytes
SHA-256: 47068641d4cd5afad495b2744cbb78709b2a1d88425159384b1e35df59296f67

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