Malicious PDF — malware analysis report

Static analysis result for SHA-256 3429097cff213b75…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 23:17:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7338f8e4bf9d7b66f4909758eb1ae4c3 SHA-1: e1258e4a631df42823520b869e872cb5e1eb0734 SHA-256: 3429097cff213b752410183247bb31690667eb250ee9650565cb601bc594ffe3
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to websites offering game hacks and free in-game currency, such as Coin Master and Roblox. The primary link, http://netcdn.tw/app/406889139/coin-master-hacks-for-cards-game-hack, is flagged as a malicious redirector. The document's structure and content strongly suggest a phishing or scam attempt designed to lure users to malicious sites, potentially for credential harvesting or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/406889139/coin-master-hacks-for-cards-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-hacks-that-work-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-redeem_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-your-roblox-account_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-easy-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-katana-and-knife-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-cheat-engine-bypass-july-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-sha-vaca-do-roblox-id_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-daily-spins-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
stream_002_off00003050.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3050 22748 bytes
SHA-256: 2ca38afb50c7656e3af9ab453c1d1a1d020f87b958ddd45d0f58c08aa417eba4
font_01_sfnt_off00006332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6332 18340 bytes
SHA-256: 472841e1220210d572fdd0c5a3b4bbcc715e0d0d344e2c4772c8c3689ee229d5

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