Malicious PDF — malware analysis report

Static analysis result for SHA-256 b578be868abb05a6…

MALICIOUS

PDF

45.1 KB Created: 2021-05-14 07:45:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 75a6a15521811aa0e264eca030154599 SHA-1: 0f86d704aaac4f413899124be44d4c67c61609b3 SHA-256: b578be868abb05a673f5b2c10831c343377280f1ce03b4a41b51f1b553c6c4f2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, disguised as "free generator" or "game hack" lures. The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-to-get-free-admin-in-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/431946152/how-to-get-free-admin-in-roblox-game-hack In PDF document text
    • http://www.salwangurgaon.com/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/get-robux-com_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000468a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x468A 26448 bytes
SHA-256: a7cb6941a0691b1c45af4208dbe9e139e6b2744aca9f21d8373a176fded0f52f
font_01_sfnt_off00008282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8282 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00008c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C22 18772 bytes
SHA-256: 6281493a1953964aeff9d3d6f15ab8f650f124b93de8f4aaa095bbd5d4484a47

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