Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ac3b52698e601e…

MALICIOUS

PDF

33.5 KB Created: 2021-06-25 09:52:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: da363b2d073dcce62a019cfa1b3ec733 SHA-1: c5d22f2c1bed06fa6f3c4a1d00d28845ff612054 SHA-256: f5ac3b52698e601e9a3a513ae8fcf12a40579ce83bcbbcfdddc3e507859d5c3c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to websites offering game hacks, generators, and free in-game currency, which is a common lure for phishing and malware distribution. The presence of a malicious redirector link and a large number of SEO-optimized PDF links suggests a campaign to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the document's structure and embedded URLs strongly indicate a malicious intent to redirect users to exploit or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/roblox-knife-simulator-hack-game-hack In PDF document text
    • http://suaedy-library.net/repository/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/no-survey-anti-bot-allowed-robux-hacker_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-gift-card-code-free-legit_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-do-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-free-gift-card-codes-unused_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-win-robux_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
font_00_sfnt_off00002a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1A 22964 bytes
SHA-256: 7d7d159fb9850a0014d0a1c0adde010ab86910f81428c1c0616fb41c0138a737
font_01_sfnt_off00005d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6E 19280 bytes
SHA-256: dd1038a55327e3da5c6685779f228e7dd51f8c55d17a2f0eaabca7ffe21de34a

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