Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d3f6e0972cd7a9…

MALICIOUS

PDF

43.9 KB Created: 2021-05-10 16:33:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f46419a75b61fdf951698802a4f8f897 SHA-1: 961e1f399cae1bec2e1f7ff6a3e02abebc6a8862 SHA-256: e7d3f6e0972cd7a93e99627a6cd8793b7bb20de995ed5ab5634cc9302ec4efad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to malicious infrastructure, specifically advertising a 'free generator / game hack'. This lure is designed to trick users into visiting a site that likely hosts further malicious content or exploits. The ML classifier also strongly flagged this PDF as malicious, supporting the observed redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-no-verification-2021-android-game-hack In PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/worst-client_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/mcpe-client_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-spins-coin-master-legit_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_003_off00004a92.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A92 25824 bytes
SHA-256: ea506399b866cb0b9bdf77df40d0145176a26372441a366ec9e0b9c48c937f84
font_01_sfnt_off0000867c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x867C 19176 bytes
SHA-256: 2db8195158682863467aa5049c27493158ce29af4e73d213a7d216c5b0c72741

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