Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e05b132a9b872e2…

MALICIOUS

PDF

37.0 KB Created: 2021-05-22 01:12:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1c42fcec7970e95269823c0cd9dc1f52 SHA-1: 267e91230610da1f16641cedb76f510ca0c07edf SHA-256: 1e05b132a9b872e2244654c5992a8d4196214acb4248886f0b6050d727818099
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors disguised as game hacks and generators, such as 'how-to-hack-a-roblox-account-2021-game-hack'. These links are designed to trick users into downloading further malicious content or visiting phishing sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/how-to-hack-a-roblox-account-2021-game-hack In PDF document text
    • http://www.zdravazena.sk/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.zdravazena.sk/images/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-roblox-codes_GM431946152.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_002_off00003343.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3343 24996 bytes
SHA-256: f3eca9a3ea7dc20f35cf25ae8bdce2a926a75d685f5224cd2c01f0135cd48bdf
font_01_sfnt_off00006cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD5 18992 bytes
SHA-256: aeef6a7714c6357f73dd4bac3524810632f54ab1d1528492d13c90d39421ba58

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