Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8101d51c1b74a93…

MALICIOUS

PDF

41.2 KB Created: 2021-05-19 00:00:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c7d98cd4fb267ad3b8a862482f46b3e3 SHA-1: ab061304761900b6d154c8cfbe9c65930b1c436a SHA-256: e8101d51c1b74a93f9f7507f7442acd797016647e9eb6107ead764490f030343
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free generators' to lure victims. The document body and embedded links suggest a phishing or scam attempt, likely to lead users to sites that host malware or attempt credential harvesting. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/cm-spin-link-game-hack In PDF document text
    • https://maquinasdetabaco.com/images/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/robux-app_GM431946152.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/coin-master-free-food_GM406889139.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/robux-prices_GM431946152.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://maquinasdetabaco.com/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn extracted file (stream_003_off0000480d.bin)

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_off0000480d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x480D 24988 bytes
SHA-256: 12fe7056e1d2c5e54d10834995825877d4c649d2e118eba485867a0e49d19bde
font_01_sfnt_off000080d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D3 17676 bytes
SHA-256: f953d4866123818d5866b37da748df1449ada45748e72b979b6621785a81e92a

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