Malicious PDF — malware analysis report

Static analysis result for SHA-256 24379600282afb02…

MALICIOUS

PDF

46.0 KB Created: 2021-05-11 15:20:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7c802f3f9a2109ccb24b1b70c2b630a9 SHA-1: 4c826ea10cec38d56543aa227f292900e4e525a1 SHA-256: 24379600282afb02fb64b72345653a3f2d1b4c4a272b440e1a44a0b857f3541b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free spins" for popular games. The primary lure URL is https://netcdn.xyz/app/406889139/coin-master-heaven-daily-free-spins-and-coins-links-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to potentially malicious sites, likely as a precursor to further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-heaven-daily-free-spins-and-coins-links-game-hack In PDF document text
    • http://thamelinn.com/userfiles/files/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-no-verification-no-survey_GM431946152.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_off00004a5f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5F 25528 bytes
SHA-256: 5025a432c1b06d1f6baf87f7a02731120fb4c876d295e03db93c42adf44a76a6
font_01_sfnt_off00008618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8618 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9002 18764 bytes
SHA-256: dfa0e0ac2467a401dcf1fafcf35c576492c4ef590534d1fa5d150cc8f866fc69

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