Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf15cf283130ff3…

MALICIOUS

PDF

38.3 KB Created: 2021-05-20 19:18:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 58ec49e1b1429f3bf6af1ec8d686f56f SHA-1: 9a73acc6f0314170dd455d271aad7f71a4ed38b0 SHA-256: 8cf15cf283130ff302e572b4e42e3ba45cd2215bff4ff4ed2d070a9928a8342b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, with a primary link identified as a malicious redirector. The document body explicitly mentions 'game hack' and 'free generator' lures, and includes a call-to-action phrase. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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-get-free-robux-without-download-apps-or-survey-game-hack In PDF document text
    • https://www.ergolight.at/images/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ergolight.at/images/mcpe-com_GM479516143.pdfIn PDF document text
    • https://www.ergolight.at/images/can-pokemon-go-free-account-2021_GM1094591345.pdfIn PDF document text
    • https://www.ergolight.at/images/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • https://www.ergolight.at/images/how-to-get-minecraft-for-free-on-chromebook_GM479516143.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_off000034fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34FE 25384 bytes
SHA-256: 0bb2ca2ad146d63ce0f9740ec2d3b76b5f479245f6310728d11912207692619d
font_01_sfnt_off00006fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC8 19880 bytes
SHA-256: a2325719e7076f7032f87f435cdda87ec67b0b67db20430c9492992df634e2b4

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