Malicious PDF — malware analysis report

Static analysis result for SHA-256 3308e2a4482593f2…

MALICIOUS

PDF

37.9 KB Created: 2021-05-23 04:47:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: bcca1dbb6c864cd1cc70436057275e75 SHA-1: f91dc111471762aeeef77cd3426ecd8c9b7ba0f8 SHA-256: 3308e2a4482593f21d5a6813305a8d86d08f87bc479303b90b180cc5efa66db2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, including one that impersonates a 'free generator / game hack' for Minecraft. The document body and heuristics indicate a lure designed to trick users into clicking these links. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/479516143/minecraft-ps4-free-game-hack In PDF document text
    • http://huounaixunghe.com/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/how-can-you-get-free-robux_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
font_00_sfnt_off00003331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3331 29052 bytes
SHA-256: 4d52072f5afffa7d181befd669f51145b90442f55e500103c868a733034774b3
font_01_sfnt_off00007489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7489 17784 bytes
SHA-256: eb08404513e1de89cb797b3c4bca4c8ebf2d802e230ebef8911427dd20e63131

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