Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91423e1b358c301…

MALICIOUS

PDF

35.9 KB Created: 2021-05-20 18:04:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 117827bbef9f7f42f5df3b016adb688e SHA-1: 023b0a5f54aae52484d3f984f6b56ae03aaca050 SHA-256: e91423e1b358c30141083cee2db70e9a9f9b06bf27200b122d834967e7297456
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency, directing users to malicious redirectors. The document body contains embedded URLs that lead to further potentially malicious PDF files, and a primary URL that appears to be a malicious redirector. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/blogspot-coin-master-free-spins-game-hack In PDF document text
    • http://www.eucorro.com/arquivos/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/robux-match_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-change-your-name-on-roblox-for-free_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_002_off000033bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33BC 24152 bytes
SHA-256: c25dd7f95eff55e3812eb9969beb647b9012c77e51af66e9ec0469ec75195c5f
font_01_sfnt_off00006aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAC 18464 bytes
SHA-256: af5d8a2e7c6ce5c46c231007036c3c30da92f088fd5d2b237af1a5c438451922

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