Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5d2db5252feb6c…

MALICIOUS

PDF

42.7 KB Created: 2021-05-11 15:48:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e694c1da4d23fc2011c5aa385caa5c59 SHA-1: 6c693b2040eb610433d4108e11843c99996aff5f SHA-256: 9c5d2db5252feb6c9bbda1dec0e1944447a4d06e2262269aa7ffa1a6991d61c1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to the malicious redirector infrastructure at `https://netcdn.xyz/app/406889139/coin-master-com-game-hack`. This infrastructure is associated with lures for game hacks and free spins, indicating a phishing or scam attempt. The presence of embedded URLs and a visual download button heuristic further supports this attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-com-game-hack In PDF document text
    • https://amiranet.com.br/files/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/where-to-get-robux_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a00.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A00 26188 bytes
SHA-256: 4cfc1922b92316479165f76b118936e69206b0c033aaf3c513a8f66fb71e9591
font_01_sfnt_off00008608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8608 17808 bytes
SHA-256: 5f65e9ddf4afff1d2178ae18e232f1b2eabc64818bd3dec8ef63fd22011a84fb

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