Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1422667faebfb70…

MALICIOUS

PDF

36.5 KB Created: 2021-05-22 11:08:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: bf0e36119c1961488b62ca9bafd1e2fc SHA-1: 0ffdc6945c04e424c056932a5ad9db04f949f325 SHA-256: a1422667faebfb702b2660532da135ffdc622d17a06bf8a471eb948cc5fb6332
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The document body and heuristics indicate a lure for 'free game hacks' or generators, specifically mentioning Minecraft. The primary malicious URL identified is https://netcdn.xyz/app/479516143/how-to-get-minecraft-pocket-edition-for-free-game-hack, which is associated with a redirector. The presence of multiple links and the ML classifier's high confidence score support this assessment.

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/479516143/how-to-get-minecraft-pocket-edition-for-free-game-hack In PDF document text
    • http://lawnn.ru/images/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://lawnn.ru/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://lawnn.ru/images/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • http://lawnn.ru/images/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lawnn.ru/images/claim-free-spins-coin-master_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_002_off000034be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34BE 24864 bytes
SHA-256: 79c247a07a58d5350b75dccf3f025d40ef3d9020e56e76db0346973d87574e94
font_01_sfnt_off00006d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D44 18372 bytes
SHA-256: 48146c158bc763bc875505d5b271c3d9491fcf22091c9e02863bb81ec9b852cb

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